validation of tropospheric emission spectrometer (tes) nadir stare ozone profiles using ozonesonde...
TRANSCRIPT
Validation of Tropospheric Emission Spectrometer (TES) nadir stare ozone profiles using ozonesonde measurements during Arctic Research
on the Composition of the Troposphere from Aircraft and Satellites (ARCTAS)
C. S. Boxe, G. Osterman, J. Worden, A. Eldering
• NASA-JPL
• TES Team
• ARC-IONS Network
Acknowledgements
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode
– TES (TES averaging kernal and a priori constraint) operator applied to TES-sonde measurment pairs
– error analysis
– Bratt’s Lake (April 18th, 2008) and Egbert (July 5th, 2008)
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode– TES (TES averaging kernal and a priori
constraint) operator applied to TES-sonde measurment pairs
– error analysis– Bratt’s Lake (April 18th, 2008) and Egbert
(July 5th, 2008)
Background and Motivation
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode– TES (TES averaging kernal and a priori
constraint) operator applied to TES-sonde measurment pairs
– error analysis– Bratt’s Lake (April 18th, 2008) and Egbert
(July 5th, 2008)
TES Stare Mode
• Stare: In nadir mode, point at specific locations over sites for validation and other scientific interest for up to about 4 minutes. Such observations are made for as long as the target is in within ±45° of the nadir direction (up to 210 seconds).
TES Stare Mode – Bratt’s Lake, April 18th, 2008
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode– TES (TES averaging kernal and a priori
constraint) operator applied to TES-sonde measurment pairs
– error analysis– Bratt’s Lake (April 18th, 2008) and Egbert
(July 5th, 2008)
TES operator applied to sonde data
a priori constraint
vector
TES averaging
kernel
Sonde Data
accounts for TES sensitivity
and vertical resolution
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode– TES (TES averaging kernal and a priori
constraint) operator applied to TES-sonde measurment pairs
– error analysis– Bratt’s Lake (April 18th, 2008) and Egbert
(July 5th, 2008)
Error Analysis
random instrument
spectral errors f.s vector errors
forward model errors
f.s vector errors
uncertainty due to unresolved fine structure
Outline
1) Background and motivation for retrieving ozone (O3) profiles via TES.
2) TES version 3 (V003) nadir stare ozone profiles comparison to ARC-IONS ozonesondes during ARCTAS
– stare observation mode– TES (TES averaging kernal and a priori
constraint) operator applied to TES-sonde measurment pairs
– error analysis– Bratt’s Lake (April 18th, 2008) and Egbert
(July 5th, 2008)
Spring and Summer TES ozone and ozonesonde comparisons
Bratt’s Lake (April 2nd, 2008), 50o N, 105o W
Barrow (April 10th, 2008), 71o N, 157o W
Barrow (April 12th, 2008), 71o N, 157o W
Barrow (April 14th, 2008), 71o N, 157o W
Bratt’s Lake (April 18th, 2008), 50o N, 105o W
Egbert (July 5th, 2008), 44o N, 80o W
Yellowknife (July 5th,2008), 62o N, 114o W
Egbert (July 7th, 2008), 44o N, 80o W
Yellowknife (July 7th,2008), 62o N, 114o W
Select Spring and Summer TES ozone and ozonesonde comparisons
April 18th, 2008, Bratt’s Lake
Select Spring and Summer TES ozone and ozonesonde comparisons
April 18th, 2008, Bratt’s Lake
Select Spring and Summer TES ozone and ozonesonde comparisons
April 18th, 2008, Bratt’s Lake
Select Spring and Summer TES ozone and ozonesonde comparisons
April 18th, 2008, Bratt’s Lake
Select Spring and Summer TES ozone and ozonesonde comparisons
April 18th, 2008, Bratt’s Lake
Select Spring and Summer TES ozone and ozonesonde comparisons
July 5th, 2008, Egbert
Select Spring and Summer TES ozone and ozonesonde comparisons
July 5th, 2008, Egbert
Select Spring and Summer TES ozone and ozonesonde comparisons
July 5th, 2008, Egbert
Select Spring and Summer TES ozone and ozonesonde comparisons
July 5th, 2008, Egbert
Select Spring and Summer TES ozone and ozonesonde comparisons
July 5th, 2008, Egbert
Conclusions
1. Actual random (noise + temperature and interfering species) error
consistent with actual errors.
2. Bias is consistent with prior sonde comparisons (H. Worden et al. 2007,
2006, 2004, and Nassar et al. 2008).
3. At high latitudes TES data primarily sensitive to ozone in the middle and
upper troposphere. Sensitivity to lower troposphere depends on thermal
contrast.