The

Swedish NFI

Jonas Fridman

Head of the Swedish NFI

SNS-meeting, Åland, September 2-3, 2015

Development last five years

90th anniversary in 2013!

Development last five years

90th anniversary in 2013!

Design o Still a combination of permanent (2/3 in red) and

temporary (1/3 in blue) tracts

o From 2013 enlarged sample of temporary tracts, +

12%, i.e. + 5% in all.

0

500

1000

1500

2000

2500

1983-1987 1988-1992 1993-1997 1998-2002 2003-2007 2008-2012 2013-2015

# of tracts (sampling units) in the Swedish NFI 1983-2015

Design/Scope

o Still a combination of permanent (2/3) and temporary (1/3) tracts

o From 2013 enlarged sample of temporary sampling units (tracts), + 12%,

i.e. totally + 5%

o From 2016 the NFI and the Swedish Forest Soil Inventory will start to

execute field inventory on Forest- and OWL-plots within the alpine area of

Sweden

Pilot inventory August-September 2015

Alpine areas in Sweden:

5,2 mill ha of challenges!

How many stems?

Dbh? Height?

Forest? Other wooded land?

Expensive!

Design/Scope

o Still a combination of permanent (2/3) and temporary (1/3) tracts

o From 2013 enlarged sample of temporary sampling units (tracts), + 12%,

i.e. totally + 5%

o From 2016 the NFI and the SFSI will start to execute field inventory on

Forest- and OWL-plots within the alpine area of Sweden

Pilot inventory August-September 2015

Total national estimates for Forest and OWL regarding growing stock,

annual increment, dead wood, AGB, BGB (and carbon) will for the first

time be reported to the next FRA/Forest Europe (2020?)

Data Collection

o 2011: Introduction of a new software package for field inventory

o 2013: The NFI and the Swedish National Soil Inventory fully integrated

Improved support for quality assurance, corrections, control-inventory,

calibration and training

o 2015: Introduction of new software and hardware for measurement of bore-

cores

Improved quality assurance, improved ergonomics, more efficient

New system för measurement of

bore-cores

Data Collection

o 2011: Introduction of a new software package for field inventory

o 2013: The NFI and the Swedish National Soil Inventory fully integrated

Improved support for quality assurance, corrections, control-inventory

and calibration and training

o 2015: Introduction of new software and hardware for measurement of bore-

cores

Improved quality assurance, improved ergonomics, more efficient

o Delivery of a complete and correct field DB in the end of December, i.e. two

months after finishing the field work in October

Data Collection (cont.)

o We still use Garmin (GPSMAP 64) for navigation and determination of

position

o 2009-2015: Tests of several recievers for high-precision position (E.g.

Arrow 100©, Trimble R1©) without finding a cost-effective solution

Official statistics, reporting and accessability

o 2013: Introduction of a totally new system for reporting using SQL Server

and OLAP cube

o Since 2013 annual official national statistics are produced using OLAP-

cubes, MS Excel and cube-formulas

o Large part of custumized reports produced using OLAP-cubes and MS

PowerPivot

o 2015: Thanks to the new systems for data capture and reporting, national

official statistics with data from 2014 were published in May 2015, 5

months earlier than before

o Data for calibration: Data from temporary plots free to download from the

NFI-web site

o TaxWeb II; a public interactive tool for NFI-estimates will be launched in

the end of September (separate presentation by Per Nilsson at 13.45

today)

Larger projects and research (some examples)

o Digitalization of the 1st NFI (1923-29) almost finished, 2nd (1938-52)

ongoing.

o 2014-2015: Skogliga grunddata => In close co-operation with the Swedish

Forest Agency, NFI-data has been used in combination with ALS-data

producing wall to wall estimates of volume, height biomass etc. (separate

presentation by Mats Nilsson at 12.00 today)

o 2014-2015: SKA 15 => In close co-operation with the Swedish Forest

Agency national long term consequence analysis are performed that will

give answers on sustainable logging levels, effects on conservation values,

climate change effects on forests and forestry.

o 2015-2016: ”Implementing model-assisted estimation techniques in the

Swedish national forest and landscape surveys”

(separate presentation by Göran Ståhl at 08.45 tomorrow)

Scientific publications

o 2014: 10 scientific papers were published where NFI-data has been

used. Authors both from the NFI-staff and others:

• Fridman, J., S. Holm, M. Nilsson, P. Nilsson, A. H. Ringvall and G. Stahl. "Adapting

National Forest Inventories to changing requirements - the case of the Swedish

National Forest Inventory at the turn of the 20th century." Silva Fennica 48(3): 1095-

article id 1095.

• Brandl, S., W. Falk, H.-J. Klemmt, G. Stricker, A. Bender, T. Roetzer and H. Pretzsch.

"Possibilities and Limitations of Spatially Explicit Site Index Modelling for Spruce Based

on National Forest Inventory Data and Digital Maps of Soil and Climate in Bavaria (SE

Germany)." Forests 5(11): 2626-2646.

• Fahlvik, N., B. Elfving and P. Wikstrom. "Evaluation of growth models used in the

Swedish Forest Planning System Heureka." Silva Fennica 48(2).

• Lindbladh, M., A.-L. Axelsson, T. Hultberg, J. Brunet and A. Felton. "From broadleaves

to spruce – the borealization of southern Sweden." Scandinavian Journal of Forest

Research 29(7): 686-696.

• Loefgren, S., M. Froeberg, J. Yu, J. Nisell and B. Ranneby. "Water chemistry in 179

randomly selected Swedish headwater streams related to forest production, clear-felling

and climate." Environmental Monitoring and Assessment 186(12): 8907-8928.

• Lundstrom, J., K. Ohman, M. Ronnqvist and L. Gustafsson. "How reserve selection is

affected by preferences in Swedish boreal forests." Forest Policy and Economics 41:

40-50.

• Löfgren, S., M. Fröberg, J. Yu, J. Nisell and B. Ranneby. "Water chemistry in 179

randomly selected Swedish headwater streams related to forest production, clear-felling

and climate." Environmental Monitoring and Assessment 186(12): 8907-8928.

• Stahl, G., J. Heikkinen, H. Petersson, La, Jr. and S. Holm. "Sample-Based Estimation

of Greenhouse Gas Emissions From Forests-A New. Approach to Account for Both

Sampling and Model Errors." Forest Science 60(1): 3-13.

• Söderberg, U., S. Wulff and G. Ståhl. "The choice of definition has a large effect on

reported quantities of dead wood in boreal forest." Scandinavian Journal of Forest

Research 29(3): 252-258.

• Valinger, E., G. Kempe and J. Fridman. "Forest management and forest state in

southern Sweden before and after the impact of storm Gudrun in the winter of 2005."

Scandinavian Journal of Forest Research 29(5): 466-472.

Thanks for your attention

and greetings from the staff!