Integrationof the
AMSR-E Ocean Productsinto the
Existing Satellite Climate Record
Joint AMSR Science Team Meeting Telluride, Colorado, July 14-16, 2008
Long Term Stability of AMSR-E Hot Load Correction
TA Calibration Over Land: characterize non-linearity
Long Term Validation / Stability of Ocean Products
Frank Wentz, Chelle Gentemann, Thomas Meissner, Lucrezia RicciardulliMarty Brewer
Remote Sensing Systems, Santa Rosa, CA
Earth System Data Record (ESDR)Ocean Climate Data Record (OCDR)
Key variables in the global energy and water cycle Wind, Vapor, Cloud, Rain:
global oceans: 24 years (1987-2010) SST:
tropical oceans: 14 years (1997-2010)global oceans: 9 years (2002-2010)
(SSM/I, TMI, AMSR, WindSat, SSMIS, …)
TB (L2A) maintenance and improvementGood Calibration has many applications
(not just for ocean products)
AMSR-E Hot Load, Corrected
Effective Hot Load Temperature (time v. orbit position)
11
23
89B
7
19
37
89A
AMSR-E Hot Load, Corrected
Effective Hot Load Temperature Anomaly (- 4 year average)
7
19
37
89A
11
23
89B
AMSR-E Hot Load Correction:Long Term Stability
Hot load correction is good, but based on ~3 years data
Does the annual cycle repeat predictably?
Is the hot load really warming with time?
Is the “warming” hot load a spurious artifact?
Re-analyze with more data (6+ years) -> better correction
After Katrina
Before Katrina
TA Calibration Over Land
6.9 GHz response is not linear
higher channels may be non-linear (to a lesser extent)
Teff correction -> precise calibration over the ocean
if linear response -> extrapolate to warm scenes (land, ice)
Improve TB over land and ice by collocating observations with:
SSM/I, TMI, and especially WindSat (very linear response)
Stability of Ocean Products
Validation is extensive and ongoingMeeting or exceeding requirements / expectations
Global Comparison
Long-term Stability of Ocean Products
4 Year SST Trend: AMSR-E v. Reynolds
Long-term Stability:Wind Speed
To whom shall we compare?(all of the above)
Validation Using Wind Speed Histograms
Validation Using Wind Speed Histograms
SSM/IVersion 5
SSM/IVersion 6
Integrationof the
AMSR-E Ocean Productsinto the
Existing Satellite Climate Record
Joint AMSR Science Team Meeting Telluride, Colorado, July 14-16, 2008
Long Term Stability of AMSR-E Hot Load Correction
TA Calibration Over Land
Long Term Validation / Stability of Ocean Products
Frank Wentz, Chelle Gentemann, Thomas Meissner, Lucrezia RicciardulliMarty Brewer
Remote Sensing Systems, Santa Rosa, CA
