MeteoSwiss Climatology MeteoSwiss Thermal and solar radiation errors on air temperature measured with upper-air radiosondes R. Philipona 1 , A. Kräuchi 2 , G. Romanens 1 , G. Levrat 1 , P. Ruppert 3 , E. Brocard 1 , P. Jeannet 1 , D. Ruffieux 1 , B. Calpini 1 1 Federal Office of Meteorology and Climatology MeteoSwiss, CH-1530 Payerne, Switzerland. 2 Institute for Atmospheric and Climate Science, ETH Zurich, CH-8057-Zurich, Switzerland. 3 Meteolabor AG, CH-8620 Wetzikon, Switzerland.
24
Embed
MeteoSwiss Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss Thermal and solar radiation errors on air temperature measured with.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Thermal and solar radiation errorson air temperature
measured with upper-air radiosondes
R. Philipona1, A. Kräuchi2, G. Romanens1, G. Levrat1, P. Ruppert3, E. Brocard1, P. Jeannet1, D. Ruffieux1, B. Calpini1
1Federal Office of Meteorology and Climatology MeteoSwiss, CH-1530 Payerne, Switzerland.2Institute for Atmospheric and Climate Science, ETH Zurich, CH-8057-Zurich, Switzerland.
3Meteolabor AG, CH-8620 Wetzikon, Switzerland.
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Motivation
WMO Intercomparison of High Quality Radiosonde SystemsYangjiang, China, 12 July - 3 August 2010
Night Day
J. Nash, T. Oakley, H. Vömel, LI Wei, WMO/TD-No. 1580, 2011
Reinvestigation of Meteolabor radiation correction
Results from the:
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Experiments: Atmosphere / Laboratory
1 Measurements of solar and thermal radiation flux profiles through the atmosphere
2 Measurements of the radiation error on unshaded and shaded temperature sensors in flight
3 Measurements of the radiation error on temperature sensors of different diameters in a vacuum chamber
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
SRS-C34 Radiosondes from Meteolabor and CNR 4 Net Radiometer from Kipp and Zonen
Radiation Measurements through the Atmosphere
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Radiation Measurements on Radiosondes
Pyranometer and Pyrgeometer measuring downward fluxes
Pyranometer and Pyrgeometer measuring upward fluxes
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Solar shortwave Radiation
Kiehl and Trenberth
SUR
Thermal longwave Rad.
Kiehl and Trenberth
168
Solar and Thermal Radiation Fluxes
LDRLURSDR
Can we measure radiation profiles through the atmosphere ?
Surface Radiation Measurements
Satellite Radiation Measurements
LDRLUR
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
LDR_nLNR_nLUR_nT_n
Night flight: 23 Sep 2011, UT21:20
Longwave Radiation Profiles during the Night
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Night flight: 23 Sep 2011, UT21:20 Day flight: 23 Sep 2011, UT10:13and
LDR_dLNR_dLUR_dT_dLDR_nLNR_nLUR_nT_n
Longwave Radiation Profiles during Night and Day
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
Solar shortwave Radiation
Kiehl and Trenberth
SUR
Thermal longwave Rad.
Kiehl and Trenberth
168
Solar and Thermal Radiation Fluxes
LDRLURSDR
Can we measure radiation profiles through the atmosphere ?
Surface Radiation Measurements
Satellite Radiation Measurements
LDRLURSUR SDR
Mete
oS
wis
s
Rolf Philipona Federal Office of Meteorology and Climatology MeteoSwiss
LDRLUR SUR DIRSDR
Shortwave and longwave Radiation Profiles
LUR_d
SUR
LUR_n
DIRSDR
LDR_d
LDR_n
Night flight: 23 Sep 2011, UT21:20 Day flight: 23 Sep 2011, UT10:13and