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Pielke Senior: NASA GISS Inaccurate Press Release On The Surface Temperature Trend Data

Watts Up With That?
Monday, January 18th, 2010

From Dr. Roger Pielke Senior’s blog:

UPDATE PM JANUARY 16 2010 – Jim Hansen has released a statement on his current conclusions regarding the global average surface temperature trends [and thanks to Leonard Ornstein and Brian Toon for alerting us to this information].   The statement is If It’s That Warm, How Come It’s So Damned Cold? by James Hansen, Reto Ruedy, Makiko Sato, Ken Lo

My comments below remain unchanged. Readers will note that Jim Hansen does not cite or comment on any of the substantive unresolved uncertainties and systematic warm bias that we report on in our papers. They only report on their research papers.   This is a clear example of  ignoring peer reviewed studies which conflict with one’s conclusions.

***ORIGINAL POST***

Thanks to Anthony Watts for alerting us to a news release by NASA GISS (see) which reads

“NASA has not been involved in any manipulation of climate data used in the annual GISS global temperature analysis. The analysis utilizes three independent data sources provided by other agencies. Quality control checks are regularly performed on that data. The analysis methodology as well as updates to the analysis are publicly available on our website. The agency is confident of the quality of this data and stands by previous scientifically based conclusions regarding global temperatures.” (GISS temperature analysis website: http://data.giss.nasa.gov/gistemp/)” [note: I could not find the specific url from NASA, so I welcome being sent this original source].

This statement perpetuates the erroneous claim that the data sources are independent [I welcome information from GISS to justify their statement, and will post if they do].  This issue exists even without considering any other concerns regarding their analyses.

I have posted a number of times on my weblog with respect to the lack of independence of the surface temperature data; e.g. see

Further Comment On The Surface Temperature Data Used In The CRU, GISS And NCDC Analyses

An Erroneous Statement Made By Phil Jones To The Media On The Independence Of The Global Surface Temperature Trend Analyses Of CRU, GISS And NCDC.

There remain also important unresolved uncertainties and systematic biases in the surface temperature data used by GISS [and CRU and NCDC] which we reported in the peer reviewed literature, i.e.

Pielke Sr., R.A., C. Davey, D. Niyogi, S. Fall, J. Steinweg-Woods, K. Hubbard, X. Lin, M. Cai, Y.-K. Lim, H. Li, J. Nielsen-Gammon, K. Gallo, R. Hale, R. Mahmood, S. Foster, R.T. McNider, and P. Blanken, 2007: Unresolved issues with the assessment of multi-decadal global land surface temperature trends. J. Geophys. Res., 112, D24S08, doi:10.1029/2006JD008229

with only one Comment in the literature on just two of our issues by the CRU group

Parker, D. E., P. Jones, T. C. Peterson, and J. Kennedy, 2009: Comment on Unresolved issues with the assessment of multidecadal global land surface temperature trends. by Roger A. Pielke Sr. et al.,J. Geophys. Res., 114, D05104, doi:10.1029/2008JD010450

which we refuted in

Pielke Sr., R.A., C. Davey, D. Niyogi, S. Fall, J. Steinweg-Woods, K. Hubbard, X. Lin, M. Cai, Y.-K. Lim, H. Li, J. Nielsen-Gammon, K. Gallo, R. Hale, R. Mahmood, S. Foster, R.T. McNider, and P. Blanken, 2009: Reply to comment by David E. Parker, Phil Jones, Thomas C. Peterson, and John Kennedy on “Unresolved issues with the assessment of multi-decadal global land surface temperature trends. J. Geophys. Res., 114, D05105,
doi:10.1029/2008JD010938

with the referees agreeing with our Reply (see reviews contained within this post).

The NASA GISS (and NCDC and CRU groups) have also not responded to the systematic warm bias that we reported in

Klotzbach, P.J., R.A. Pielke Sr., R.A. Pielke Jr., J.R. Christy, and R.T. McNider, 2009: An alternative explanation for differential temperature trends at the surface and in the lower troposphere. J. Geophys. Res., 114, D21102, doi:10.1029/2009JD011841.

Klotzbach, P. J., R. A. Pielke, Sr., R. A. Pielke, Jr., J. R. Christy, and R. T. McNider (2010), Correction to “An alternative explanation for differential temperature trends at the surface and in the lower troposphere”, J. Geophys. Res., 115, D01107, doi:10.1029/2009JD013655.

The GISS news release is symptomatic of the continued attempt to ignore science issues in their data analysis which conflict with their statement in the press release. This is not how the scientific process should be conducted.

We urge, based on the exposure of such type of behavior in the CRU e-mails; i.e. see

The Crutape Letters by Steven Mosher, Thomas W. Fuller, 2010 ISBN/EAN13: 1450512437 / 9781450512435

that the suppression of alternative viewpoints ends.

View the original article at Watts Up With That?

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