EMODnet Thematic Lot n° 4 - Chemistry
Black Sea
Data Collection and Metadata Compilation - nutrients data Quality control of nutrients data
First DIVA products
Luminita Buga - NIMRD George Sarbu - NIMRD
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Contents
1. Introduction ..................................................................................................... 3
1.1 Black Sea Data Set ...................................................................................................................... 3
1.2 Workflow .................................................................................................................................... 3
1.3 Black Sea aggregated data collection ......................................................................................... 5
2. Ammonium data set ......................................................................................... 8
3. Silicates data set ............................................................................................ 11
4. Phosphates data set ....................................................................................... 14
5. Nitrites data set ............................................................................................. 17
6. Nitrates data set ............................................................................................ 20
7. Nitrate + Nitrite (NOx) data set ...................................................................... 23
8. Nutrients data Quality Control ....................................................................... 26
9. First DIVA tests ............................................................................................... 27
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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1. Introduction
1.1 Black Sea Data Set
The EMODnet dataset for the nutrients in the Black Sea region contains:
27694 files in ODV format received from MARIS Harvester Robot 1724 files in ODV format received from MHI
The following errors / problems occurred during Black Sea data aggregation:
Errors at importing in ODV: ODV format (wrong date format, missing QF column, etc) Mismatches between semantic header and header
Poor quality control:
High parameters values (outliers ?) No quality control (QV=0) Same value for all profile
Duplicates:
Cruise with more than one station reported as one CDI Same station(s) reported by 2 partners
1.2 Workflow
Due to the above mentioned problems, to the high number of the contributing data centers and
the high variability of the parameters labeling the following workflow was adopted:
1. ROBOT and MHI data set separated into individual data sets for every EDMO_code
2. Individual data sets imported into individual ODV collection
3. Detected ODV import errors errors corrected (in original ODV files)
4. Duplicates check for individual EDMO_code ODV collections
duplicates solved (when possible) (in original ODV files)
keep records of duplicates for further reporting to data centers
5. Re-import corrected ODV files into ODV individual collections
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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6. Units check / values check
detected wrong units contact data centers
detected impossible units values contact data centers
check for data values = 0 contact data center to check if they are missing values or
“under detection limit values
7. Export Station Data into individual EDMO_code ODV Spreadsheet files (only nutrients and
silicates variables) and:
corrections of units and /or data values (new corrected ODV files send by data centers)
data center confirmed “0” values as missing deleted (QV (SDN quality flag) =9)
QV = 3 QV=4
QV =6 (data 0, real detection limit) QV=1 and keep records of real detection limits
QV =6 (data =0) QV=3
obvious bad data and/or default data QV=4
Units conversion in mol/l
After this step individual ODV Spreadsheet files for every EDMO_code containing only nutrients
and silicates data (in mol/l) and with SDN quality flags were available for importing into new
Black Sea ODV collection
8. Created New_ODVCF6_Collection (Black_Sea_ collection) with only nutrients and silicates
variables and manually set for every variable QF schema = SEADATANET
10. Imported all individual EDMO_code ODV Spreadsheet files into new Black_Sea_collection
(when importing the individual EDMO_code ODV Spreadsheet files the original SEADATANET
Quality flags are maintained)
11. Duplicates check for Black_Sea_collection duplicates found (Same station(s) reported by 2
partners) duplicates report to be send to data centers
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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1.3 Black Sea aggregated data collection
The Black_Sea_collection contains:
28695 stations - vertical profiles
Spatial coverage and plots of variables:
Pressure, temperature profiles into depth profiles Corrections for mismatches between semantic headed – header Profiles availability only for nutrients (and silicates) data
ALL units in mol/l NO quality control on data NO (NO2+NO3) calculated WITH “0” for “under detection limit”
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Temporal coverage: 1955 - 2013
7 stations - time series
Spatial coverage
19
55
19
57
19
59
19
61
19
63
19
65
19
67
19
69
19
71
19
73
19
75
19
77
19
79
19
81
19
83
19
85
19
87
19
89
19
91
19
93
19
95
19
97
19
99
20
01
20
03
20
05
20
07
20
09
20
11
20
13
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Black Sea data contributors
Name EDMO_ code No CDIs Time Coverage Depth profiles/
Time Series
1 HCMR 269 4 2007 2007 DP
2 RIHMI-WDC 681 1793 1967 1994 DP
3 SIO-RAS 685 235 1985 2008 DP
4 YugNIRO 688 9650 1955 1996 DP
5 TSU_DNA 693 85 1999 2012 DP
5 IMS-METU 696 1897 1986 2010 DP
7 NIMRD 697 3911 1963 2012 DP
8 SOI (data on SIO-RAS server) 723 4048 2001 2010 DP
9 MHI 727 2356 1955 2011 DP
10 MB-UHMI 841 1933 2003 2010 DP
11 UkrSCES 1167 1582 1983 2000 DP
12 IO-BAS 1843 34 1990 1990 DP
13 IFR 191 50 2002 2003 DP
14 LME_BG 192 697 1987 2006 DP
15 BGODC 692 377 2000 2013 DP
16 Odessa National I.I.Mechnikov University 1169 10 1998 1998 DP
17 Taurida V.I. Vernadsky National University 2227 16 1996 1996 DP
18 Sinop University, Fisheries Faculty 733 17 1999 1999 DP
19 MB-UHMI 841 3 2003 2004 TS
20 DDBRA 2178 4 2008 2010 TS
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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2. Ammonium data set
The Ammonium dataset contains the following related parameters:
Parameter label P01 CODES P06 units
Units conversion to
mol/l P01 definition
AMON [mol/m^3] Codes: AMONAAZX:MLM3
mol/m3 Value * 1000
Concentration of ammonium {NH4} per unit volume of the water body [unknown phase] by colorimetric autoanalysis
AMON [~$m~#mol/l]
Codes: AMONAAZX:UPOX, AMONZZXX:UPOX
mol/l -
Concentration of ammonium {NH4} per unit volume of the water body [unknown phase] by colorimetric autoanalysis
Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
N_NH4 [mg/l] Codes: AMONMATX:UMGL
mg/l Value * 1000/14.0067
Concentration of ammonium {NH4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysi
WC_NH4 [~$m~#mol/l]
Codes: AMONMATX:UPOX
mol/l -
Concentration of ammonium {NH4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysi
AMON [mm/l] Codes: AMONZZXX:MMPL
mmol/l Value * 1000 Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
Ammonium [mm/l]
Codes: AMONZZXX:MMPL
mmol/l Value * 1000 Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
Ammonia [mm/l] Codes: AMONZZXX:MMPL
mmol/l Value * 1000 Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
Ammonium [~$m~#g/l]
Codes: AMONZZXX:UGPL
g/l Value/14.0067 Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
AMON [mg/l] Codes: AMONZZXX:UMGL
mg/l Value * 1000/14.0067
Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
NH4 [~$m~#mol/l] Codes: AMONZZXX:UPOX
mol/l - Concentration of ammonium {NH4} per unit volume of the water body [unknown phase]
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Ammonium (N-NH4) data set contains:
Total depth profiles (stations): 7166
Total measurements: 25742 from which:
23193 data 0
2549 data = 0
Spatial coverage and plot of Ammonium data set
Data with QV (SEADATANET) =0, 1, 2 Excluded data with QV=4 “0” values with QV=3
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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N-NH4 Stations density distribution
N-NH4 Temporal coverage / number of profiles per year
0
100
200
300
400
500
600
700
1955
1957
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
1 19
1
1 5
0
14
1
45
3
11
56
6
4
51
4
5
16
0
93
9
3 1
35
1
70
9
6
22
1
17
3
26
1
13
1
14
4
12
7
96
1
7
34
73
12
9
24
6
22
1
42
7
66
4
62
7
50
8
32
7
41
1
29
9
32
8
10
7
24
8
80
N-NH4 1955 - 2013
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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3. Silicates data set
The Ammonium dataset contains the following related parameters:
Parameter label
P01 CODES P06 units
Units conversion to
mol/l P01 definition
Si [mg/l] Codes: SLCAMATX:UMGL
mg/l Value* 1000/28.08550
Concentration of silicate {SiO4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
WC_SiO4 [~$m~#mol/l]
Codes: SLCAMATX:UPOX
mol/l -
Concentration of silicate {SiO4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
SLCA [~$m~#mol/l]
Codes: SLCAMAZX:UPOX, SLCAZZXX:UPOX
mol/l -
Concentration of silicate {SiO4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
SLCA [mm/l] Codes: SLCAZZXX:MMPL
mmol/l Value * 1000 Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
Silicate [mm/l]
Codes: SLCAZZXX:MMPL
mmol/l Value * 1000 Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
Silicate [~$m~#g/l]
Codes: SLCAZZXX:UGPL
mg/l Value /28.0855 Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
SIO3 [~$m~#mol/l]
Codes: SLCAZZXX:UPOX
mol/l - Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
SI [~$m~#mol/l]
Codes: SLCAZZXX:UPOX
mol/l - Concentration of silicate {SiO4} per unit volume of the water body [unknown phase]
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Silicates (S-SiO4) data set contains:
Total depth profiles (stations): 19146
Total measurements: 109326 from which:
108026 data 0 1300 data = 0
Spatial coverage and plot of Silicates data set
Data with QV=0, 1, 2 Excluded data with QV=4 “0” values with QV=3
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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S-SiO4 Stations density distribution
S-SiO4 Temporal coverage / number of profiles per year
0
100
200
300
400
500
600
700
800
900
1000
1955
1957
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
10
4
12
5
11
3
11
0
13
3
16
3
32
3
30
0 3
94
2
97
2
36
29
5
28
5
26
5
17
9
16
6
42
0
36
6
47
8
47
1
23
0
54
10
7
32
3
37
2
27
6
41
2
34
2 4
40
4
01
3
33
6
89
8
35
92
4
33
8
61
2
37
2
36
4
58
1
45
8
32
1
27
2
12
0
88
14
8 21
0
32
0
20
5
40
4
60
6
52
7 58
6
32
8 4
06
2
91
37
9
10
7
62
8
0
SiO4 1955 - 2013
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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4. Phosphates data set
The Ammonium dataset contains the following related parameters:
Parameter label P01 CODES P06
units
Units conversion to
mol/l P01 definition
PO4 [~$m~#mol/kg]
Codes: MDMAP906:KGUM
mol/kg Value * 1
Concentration of phosphate {PO4} per unit mass of the water body [unknown phase]
PHOS0 [~$m~#mol/l]
Codes: PHOSAADZ:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body dissolved plus reactive particulate <unknown phase] by filtration and colorimetric autoanalysis
PHOS1 [~$m~#mol/l]
Codes: PHOSAAZX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase] by colorimetric autoanalysis
PHOS2 [~$m~#mol/l]
Codes: PHOSZZXX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
PHOS [~$m~#mol/l]
Codes: PHOSAAZX:UPOX, PHOSZZXX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase] by colorimetric autoanalysis
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
P_PO4 [mg/l] Codes: PHOSMATX:UMGL
mg/l Value * 1000/30.97376
Concentration of phosphate {PO4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
WC_PO4 [~$m~#mol/l]
Codes: PHOSMATX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
PO4 [~$m~#mol/l]
Codes: PHOSMAZX:UPOX, PHOSZZXX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase] by manual colorimetric analysis
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
Phosphate [~$m~#mol/kg]
Codes: PHOSZZXX:KGUM
mol/kg Value * 1
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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PHOS [mm/l] Codes: PHOSZZXX:MMPL
mmol/l Value * 1000
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
Phosphate [mm/l]
Codes: PHOSZZXX:MMPL
mmol/l Value * 1000
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
Phosphate [~$m~#g/l]
Codes: PHOSZZXX:UGPL
g/l Value/30.97376
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
PHOS [ug/l] Codes: PHOSZZXX:UPGL
g/l Value/30.97376
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
Phosphates [~$m~#mol/l]
Codes: PHOSZZXX:UPOX
mol/l -
Concentration of phosphate {PO4} per unit volume of the water body [unknown phase
Phosphates (P-PO4) data set contains:
Total depth profiles (stations): 23387 Total measurements: 135391 from which:
126318 data 0 9073 data = 0
Spatial coverage and plot of Phosphates data set
Data with QV=0, 1, 2 Excluded data with QV=4 “0” values with QV=3
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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P-PO4 Stations density distribution
P-PO4 Temporal coverage / number of profiles per year
0
200
400
600
800
1000
1200
1955
1957
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
11
8
12
6
13
3
12
2 18
2
19
4
37
1
34
1
39
3
30
2
24
1 30
8
29
6
26
2
18
3
18
6
40
4
37
9 4
83
5
38
2
80
1
52
2
77
3
24
3
58
2
77
5
32
3
94
46
0
40
4
43
3
70
1
96
9
11
80
4
21
7
47
4
65
1
00
7
93
5
80
7
61
3
45
8
11
9
11
3
25
1
37
8
36
0
24
8
42
0
68
4
63
4
58
4
32
8 40
8
29
0 3
79
1
07
2
48
8
0
PO4 1955 - 2013
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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5. Nitrites data set
The Nitrites dataset contains the following related parameters:
Parameter label
P01 CODES P06
units
Units conversion to
mol/l P01 definition
N_NO2 [mg/l] Codes: NTRIMATX:UMGL
mg/l Value * 1000/14.0067
Concentration of nitrite {NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
WC_NO2 [~$m~#mol/l]
Codes: NTRIMATX:UPOX
mol/l -
Concentration of nitrite {NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
Nitrite [mm/l] Codes: NTRIZZXX:MMPL
mmol/l Value * 1000 Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
Nitrites [mm/l] Codes: NTRIZZXX:MMPL
mmol/l Value * 1000 Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
NTRI [mm/l] Codes: NTRIZZXX:MMPL, MDMAP007:MMPL
mmol/l Value * 1000
Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
Concentration of nitrite {NO2} per unit mass of the water body [unknown phase]
Nitrite [~$m~#g/l]
Codes: NTRIZZXX:UGPL
g/l Value/14.0067 Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
NTRI [mg/l] Codes: NTRIZZXX:UMGL
mg/l Value * 1000/14.0067
Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
NTRI [~$m~#mol/l]
Codes: NTRIZZXX:UPOX
mol/l - Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
NO2 [~$m~#mol/l]
Codes: NTRIZZXX:UPOX
mol/l - Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
Nitrite [~$m~#mol/l]
Codes: NTRIZZXX:UPOX
mol/l - Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
NTRI [ug/l] Codes: NTRIZZZZ:UPGL
g/l Value/14.0067 Concentration of nitrite {NO2} per unit volume of the water body [unknown phase]
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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Nitrites (N-NO2) data set contains:
Total depth profiles (stations): 12128 Total measurements: 53032 from which:
40134 data 0 12898 data = 0
Spatial coverage and plot of Nitrites data set
Data with QV=0, 1, 2 Excluded data with QV=4 “0” values with QV=3
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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N-NO2 Stations density distribution
N-NO2 Temporal coverage / number of profiles per year
0
100
200
300
400
500
600
700
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
71
7
7
82
8
0
26
6
27
5
21
2 23
8
18
2
95
6
38
1 14
1
5
98
56
10
7
12
4
13
2
12
2
14
1
13
1
12
0
24
7
93
1
61
20
3
18
2
96
3
71
2
76
6
70
6
66
5
34
5
12
2
34
7
1 10
4
22
8
31
7
26
8
18
9
40
8
68
3
63
2
52
0
26
9
41
6
30
1 35
9
10
7
24
8
80
N-NO2
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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6. Nitrates data set
The Nitrites dataset contains the following related parameters:
Parameter label P01 CODES P06
units
Units conversion to
mol/l P01 definition
NTRA [mol/m^3] Codes: CHEMM012:MLM3
mol/m3 Value *1000
Concentration of nitrate {NO3} (NOT nitrate+nitrite) per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis and correction for nitrite
N_NO3 [mg/l] Codes: NTRAYYDZ:UMGL
mg/l Value * 1000/14.0067
Concentration of nitrate {NO3} per unit volume of the water body [dissolved plus reactive particulate phase]
Nitrate [~$m~#mol/kg]
Codes: NTRAZZXX:KGUM
mol/kg Value Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
Nitrate [mm/l] Codes: NTRAZZXX:MMPL
mmol/l Value *1000 Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
Nitrates [mm/l] Codes: NTRAZZXX:MMPL
mmol/l Value *1000 Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
NTRA [mm/l] Codes: NTRAZZXX:MMPL, MDMAP005:MMPL
mmol/l Value *1000
Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
Concentration of nitrate {NO3} per unit mass of the water body [unknown phase]
Nitrate [~$m~#g/l] Codes: NTRAZZXX:UGPL
g/l Value /14.0067 Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
NTRA [mg/l] Codes: NTRAZZXX:UMGL
mg/l Value * 1000/14.0067
Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
NTRA [ug/l] Codes: NTRAZZXX:UPGL
g/l Value /14.0067 Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
NTRA [~$m~#mol/l] Codes: NTRAZZXX:UPOX
mol/l - Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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NO3 [~$m~#mol/l] Codes: NTRAZZXX:UPOX
mol/l - Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
Nitrates [~$m~#mol/l]
Codes: NTRAZZXX:UPOX
mol/l - Concentration of nitrate {NO3} per unit volume of the water body [unknown phase]
WC_NO3 [~$m~#mol/l]
Codes: NTRZMATX:UPOX, NTRAMADZ:UPOX
mol/l -
Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
Concentration of nitrate {NO3} per unit volume of the water body [dissolved plus reactive particulate <unknown phase] by filtration and manual colorimetric analysis and correction for nitrite
Nitrites (N-NO2) data set contains:
Total depth profiles (stations): 8771 Total measurements: 37996 from which:
31775 data 0 6241 data = 0
Spatial coverage and plot of Nitrites data set
Data with QV=0, 1, 2 Excluded data with QV=4 “0” values with QV=3
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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N-NO3 Stations density distribution
N-NO2 Temporal coverage / number of profiles per year
0
100
200
300
400
500
600
1955
1957
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
5
74
5
3
62
4
1
20
9
15
5
4
2
2
10
7
58
1
07
1
24
1
11
1
10
6
9
51
1
02
2
74
9
3 1
28
1
41
2
09
8
6
16
3
25
9
47
2
56
9
51
8
36
0
23
6
52
1
00
14
2
22
4
15
3
13
5
31
6
53
1
44
4
40
1
15
8
27
1
21
6
23
9
10
7
24
8
80
N-NO3 1955 - 2013
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7. Nitrate + Nitrite (NOx) data set
The original EMODnet dataset for the nutrients in the Black Sea (NO3+NO2) data with the
following related parameters:
Parameter label
P01 CODES P06
units
Units conversion
to mol/l P01 definition
WC_NO3 [~$m~#mol/l]
Codes: NTRZMATX:UPOX, NTRAMADZ:UPOX
mol/l -
Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by manual colorimetric analysis
Concentration of nitrate {NO3} per unit volume of the water body [dissolved plus reactive particulate <unknown phase] by filtration and manual colorimetric analysis and correction for nitrite
Nitrate+nitrite [mm/l]
Codes: NTRZZZXX:MMPL
mmol/l Value * 1000
Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [unknown phase]
Nitrogen [mm/l]
Codes: NTRZZZXX:MMPL
mmol/l Value *1000
Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [unknown phase]
NTRZ [~$m~#mol/l]
Codes: NTRZZZXX:UPOX
mol/l - Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [unknown phase]
NO3_NO2 [~$m~#mol/l]
Codes: NTRZZZXX:UPOX
mol/l - Concentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [unknown phase]
Because the final product will deal with NOx (NO2_NO3) the following steps were done:
1. From the ODV Black_Sea_collection Export Station Data into ODV Spreadsheet files
only NO2, NO3 and (NO3+NO2) (in mol/l)
2. Calculation of NOx (NO2_NO3) as following:
If [NO3 (QV= 1 or QV=2) and NO2 (QV=1 or QV=2 or QV=3 or QV=9)]
then calculate NOx=NO2+NO3
else “null value”
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3. For calculated NOx ‘null value” QV=1
4. For calculated NOx = “null value” QV=9
5. If NO2, NO3 and (NO3+NO2) were provided in the same time then comparison between
(NO3+NO2) and calculated NOx as following:
If [(NO3+NO2) >0 and (QV=1 or QV=2)] and [(NO3+NO2) calculated NOx]
then keep (NO3+NO2) for final product
else keep calculated NOx for final product
Final NOx data set contains:
Total depth profiles (stations): 9506 Total measurements: 47157 from which:
47157 data 0 0 data = 0
Spatial coverage and plot of NOx (NO2_NO3) data set
Aggregated NOx (NO3 & calculated NOx) Data with QV=0, 1, 2 (NO3) Data with QV=1 (NOx) “0” values with QV=3 (NO3)
EMODnet Thematic Lot n° 4 - Chemistry Black Sea - 1st intermediate report
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NOx Stations density distribution
NOx Temporal coverage / number of profiles per year
0
100
200
300
400
500
600
700
800
1955
1957
1959
1961
1963
1965
1967
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
2013
4 5
2
35
4
2
25
1
12
7
5
2
10
7
57
10
7
12
4
11
1
11
0
69
5
1 1
02
2
58
9
3
19
2
22
9 27
8
15
3 2
48
34
3
53
2
70
1
60
5
49
3
24
9
11
7
10
5 1
83
3
28
2
26
1
35
2
44
4
50
4
28
3
88
2
21
31
5
21
6 26
7
10
7 1
77
4
0
N-NOx 1955 - 2013
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8. Nutrients data Quality Control
After the second MARIS ROBOT harvesting for nutrients data sets, the new data will be proceeded
following the same steps as described in 1.2. Workflow.
The new obtained individual EDMO_code ODV Spreadsheet files will be imported into Black_Sea_collection
Due to the high variability of the nutrients values (from the coast to the center of the Black Sea)
and to the different characteristics of entire basin MEDAR/MEDATLAS Sub-domains for Black Sea
will be used for setting the minimum-maximum nutrients values.
For every sub domains, Specialist Quality control (in collaboration with Black Sea partners)
will be done especially for high values outliers: possible/impossible values.
For DIVA products only values with QV = 0, 1, 2 will be used.
Specialist selection on periods: Years vs selection of years (decades and/or trends periods)
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9. First DIVA tests
The first DIVA attempts to produce gridded fields were done on Nitrate (NO3) parameter for the
whole Black Sea, Marmara Sea and Azov Sea as they are included in one MSFD region.
Initial settings are as following:
Levels: 0, 10, 20, 30, 50, 75, 100
Years: 1955 – 2013
Months: 03-05, 06-08 (spring, summer)
Quality flags (SDN): 0, 1, 2
Lc: correlation: 1.5
Signal to noise ratio of the whole dataset: 0.5
ireg: mode selected for background field: mean of data
As example of resulting maps, the spring season gridded fields with the data location are illustrated
bellow. The calculated optimized DIVA input parameters are shown for each level.
NO3- Level: 0m Months: 03-05 Optimized CL: 0.332; Optimized S/N: 0.1 Varbak: 0.149
NO3- Level: 10m Months: 03-05 Optimized CL: 0.883; Optimized S/N: 0.1 Varbak: 0.149
NO3- Level: 100m Months: 03-05 Optimized CL: 0.507; Optimized S/N: 0.1 Varbak: 0.149
NO3- Level: 75m Months: 03-05 Optimized CL: 0.268; Optimized S/N: 0.1 Varbak: 0.149
