transcript
- Slide 1
- 1 CAVIAR meeting in NPL 2 June 2008 Water vapour continuum in
near-IR band centres: Recent RAL measurements, results and problems
I. Ptashnik & K. Shine (Dept. of Meteorology, University of
Reading) R. McPheat & K. Smith (MSF, Rutherford Appleton
Laboratory) (Acknowledges to David Paynter)
- Slide 2
- 2 CAVIAR meeting in NPL 2 June 2008 Water continuum in near-IR
spectral region Simulated spectra for 15 mbar pure H2O, 10m, 293K /
WD HWHM=25 cm -1, Keq=0.04 atm -1 (Curtiss et al., 1979) /
- Slide 3
- 3 CAVIAR meeting in NPL 2 June 2008 RAL_measur. -
Local_lines_contribution Recent experiment at MSF (RAL) in 1600 cm
-1 H 2 O band ( * ) Department of Physical Chemistry, Hebrew
University, Jerusalem
- Slide 4
- 4 CAVIAR meeting in NPL 2 June 2008 RAL_measur. -
Local_lines_contribution Recent experiment at MSF (RAL) in 3700 cm
-1 H 2 O band
- Slide 5
- 5 CAVIAR meeting in NPL 2 June 2008 RAL_measur. -
Local_lines_contribution Recent experiment at MSF (RAL) in 5400 cm
-1 H 2 O band
- Slide 6
- 6 CAVIAR meeting in NPL 2 June 2008 RAL_measur. -
Local_lines_contribution Recent experiment at MSF (RAL) in 7200 cm
-1 H 2 O band
- Slide 7
- 7 CAVIAR meeting in NPL 2 June 2008 Precise baseline
determination Problem 1: Band wings ? ? ?
- Slide 8
- 8 CAVIAR meeting in NPL 2 June 2008 Precise baseline
determination (pure H 2 O) Problem 1: Band wings
- Slide 9
- 9 CAVIAR meeting in NPL 2 June 2008 Precise baseline
determination (mixture with 1 atm air) Problem 1: Band wings
- Slide 10
- 10 CAVIAR meeting in NPL 2 June 2008 Precise baseline
determination Problem 1: Band wings ? ? ?
- Slide 11
- 11 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
and retrieved continuum Line Continuum cont. P H2O 2 cont. ( total
- lines ) cont. (2 - 4) P H2O !!!
- Slide 12
- 12 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (pure H 2
O)
- Slide 13
- 13 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (pure H 2
O)
- Slide 14
- 14 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 15
- 15 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 16
- 16 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 17
- 17 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 18
- 18 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 19
- 19 CAVIAR meeting in NPL 2 June 2008 Problem 2: H 2 O pressure
Retrieval of water vapour pressure from the spectrum (H 2 O in 1
atm air)
- Slide 20
- 20 CAVIAR meeting in NPL 2 June 2008 Thank you