Gert König-Langlo
Alfred Wegener Institut
für Polar- und Meeresforschung
23.06.2016 2
Typical TOA Long-Wave Emission
14th BSRN workshop, Canberra,
April 26-29, 2016
TES-Band
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
3
Typical Spectra from Satellite (Tropospheric Emission Spectrometer)
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
4
Typical Spectra from Satellite (Tropospheric Emission Spectrometer)
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
5
Yearly averaged greenhouse effect of CO2 in 2006
calculated from TES
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
6
Seasonally averaged greenhouse effect of CO2 in 2006,
calculated from TES spectra
DJF
MAM
JJA
SON
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
7
Monthly averaged temperature profiles
from South Pole
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
8
Effect of increasing CO2 on FTOA
using the line-by-line modell ALFIP
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
9
Greenhouse effect of CO2 as a function of
CO2 concentration for temperature profiles from South Pole
23.06.2016 10
Yearly averaged air temperature at Neumayer
14th BSRN workshop, Canberra,
April 26-29, 2016
23.06.2016 11
Temperature trends from observations
A
Synthesis of
Antarctic
Temperature
s (CHAPMAN
et al., 2006)
14th BSRN workshop, Canberra,
April 26-29, 2016
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
12
Summary
• „Global warming“ does not take place in central Antarctica
• The greenhouse effekt (GEH) is extremely week and even
negative in central Antarctica
• Increasing CO2 leads to increasing LW-TOA fluxes over
central Antarctica
• The main reason: The surface in central Antarctica is
frequently colder than the stratosphere
Open Question: Where does the CO2-cooling takes place???
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
13
LWD modelled using ALFIP
(T-profiles from South Pole, no clouds)
23.06.2016 14th BSRN workshop, Canberra,
April 26-29, 2016
14
Summary LWD
Long Wave Downwelling radiation (Fsurf)
• For increasing CO2 the emission height decreases
• For a temperature inversion increasing CO2 leads
to a decrease of Fsurf for the center of the CO2 band
• Overall, an increase in CO2 leads to an increase in Fsurf