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contributor authorPo-Chedley, Stephen
contributor authorFu, Qiang
date accessioned2017-06-09T17:24:46Z
date available2017-06-09T17:24:46Z
date copyright2013/05/01
date issued2013
identifier issn0739-0572
identifier otherams-84763.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4228135
description abstracthe main finding by Po-Chedley and Fu was that the University of Alabama in Huntsville (UAH) microwave sounding unit (MSU) product has a bias in its NOAA-9 midtropospheric channel (TMT) warm target factor, which leads to a cold bias in the TMT trend. This reply demonstrates that the central arguments by Christy and Spencer to challenge Po-Chedley and Fu do not stand. This reply establishes that 1) Christy and Spencer found a similar, but insignificant, bias in the UAH target factor because their radiosonde data lack adequate sampling and measurement errors were considered twice; 2) the UAH individual satellite TMT difference between NOAA-9 and NOAA-6 reveals a bias of 0.082 ± 0.011 in the UAH NOAA-9 target factor; 3) comparing the periods before and after NOAA-9 is not an adequate method to draw conclusions about NOAA-9 because of the influence of other satellites; 4) using the Christy and Spencer trend sensitivity value, UAH TMT has a cold bias of 0.035 K decade?1 given a target factor bias of 0.082; 5) similar trends from UAH and Remote Sensing Systems (RSS) for the lower tropospheric temperature product (TLT) do not indicate that the UAH TMT and TLT NOAA-9 target factor is unbiased; and 6) the NOAA-9 warm target temperature signal in UAH TMT indicates a problem with the UAH empirical algorithm to derive the target factor.
publisherAmerican Meteorological Society
titleReply to “Comments on ‘A Bias in the Midtropospheric Channel Warm Target Factor on the NOAA-9 Microwave Sounding Unit’”
typeJournal Paper
journal volume30
journal issue5
journal titleJournal of Atmospheric and Oceanic Technology
identifier doi10.1175/JTECH-D-12-00131.1
journal fristpage1014
journal lastpage1020
treeJournal of Atmospheric and Oceanic Technology:;2013:;volume( 030 ):;issue: 005
contenttypeFulltext


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