Comments on "erroneous model field representations in multiple pseudoproxy studies: Corrections and implications"

Scott D. Rutherford, Michael E. Mann, Eugene Wahl, Caspar Ammann

Research output: Contribution to journalComment/debate

5 Citations (Scopus)

Abstract

Smerdon et al. report two errors in the climate model grid data used in previous pseudoproxy-based climate reconstruction experiments that do not impact the main conclusions of those works. The errors did not occur in subsequent works and therefore have no impact on the results presented therein. Results presented here for the Climate System Model (CSM) using multiple pseudoproxy noise realizations show that the quantitative differences between the incorrect and corrected results are within the expected variability of the noise realizations. It should also be made clear that the climate reconstruction method used in Smerdon et al. to illustrate the nature of the errors, the Regularized Expectation Maximization method with Ridge Regression (RegEM-Ridge), is known to produce climate reconstructions with considerable variance loss and has been superseded by RegEM-TTLS (TTLS indicates truncated total least squares).

Original languageEnglish (US)
Pages (from-to)3482-3484
Number of pages3
JournalJournal of Climate
Volume26
Issue number10
DOIs
StatePublished - May 1 2013

Fingerprint

climate
climate modeling
experiment
method
loss

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Rutherford, Scott D. ; Mann, Michael E. ; Wahl, Eugene ; Ammann, Caspar. / Comments on "erroneous model field representations in multiple pseudoproxy studies : Corrections and implications". In: Journal of Climate. 2013 ; Vol. 26, No. 10. pp. 3482-3484.
@article{37d4e7b8cb3f444db22237bf8ebfb8fd,
title = "Comments on {"}erroneous model field representations in multiple pseudoproxy studies: Corrections and implications{"}",
abstract = "Smerdon et al. report two errors in the climate model grid data used in previous pseudoproxy-based climate reconstruction experiments that do not impact the main conclusions of those works. The errors did not occur in subsequent works and therefore have no impact on the results presented therein. Results presented here for the Climate System Model (CSM) using multiple pseudoproxy noise realizations show that the quantitative differences between the incorrect and corrected results are within the expected variability of the noise realizations. It should also be made clear that the climate reconstruction method used in Smerdon et al. to illustrate the nature of the errors, the Regularized Expectation Maximization method with Ridge Regression (RegEM-Ridge), is known to produce climate reconstructions with considerable variance loss and has been superseded by RegEM-TTLS (TTLS indicates truncated total least squares).",
author = "Rutherford, {Scott D.} and Mann, {Michael E.} and Eugene Wahl and Caspar Ammann",
year = "2013",
month = "5",
day = "1",
doi = "10.1175/JCLI-D-12-00065.1",
language = "English (US)",
volume = "26",
pages = "3482--3484",
journal = "Journal of Climate",
issn = "0894-8755",
publisher = "American Meteorological Society",
number = "10",

}

Comments on "erroneous model field representations in multiple pseudoproxy studies : Corrections and implications". / Rutherford, Scott D.; Mann, Michael E.; Wahl, Eugene; Ammann, Caspar.

In: Journal of Climate, Vol. 26, No. 10, 01.05.2013, p. 3482-3484.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Comments on "erroneous model field representations in multiple pseudoproxy studies

T2 - Corrections and implications"

AU - Rutherford, Scott D.

AU - Mann, Michael E.

AU - Wahl, Eugene

AU - Ammann, Caspar

PY - 2013/5/1

Y1 - 2013/5/1

N2 - Smerdon et al. report two errors in the climate model grid data used in previous pseudoproxy-based climate reconstruction experiments that do not impact the main conclusions of those works. The errors did not occur in subsequent works and therefore have no impact on the results presented therein. Results presented here for the Climate System Model (CSM) using multiple pseudoproxy noise realizations show that the quantitative differences between the incorrect and corrected results are within the expected variability of the noise realizations. It should also be made clear that the climate reconstruction method used in Smerdon et al. to illustrate the nature of the errors, the Regularized Expectation Maximization method with Ridge Regression (RegEM-Ridge), is known to produce climate reconstructions with considerable variance loss and has been superseded by RegEM-TTLS (TTLS indicates truncated total least squares).

AB - Smerdon et al. report two errors in the climate model grid data used in previous pseudoproxy-based climate reconstruction experiments that do not impact the main conclusions of those works. The errors did not occur in subsequent works and therefore have no impact on the results presented therein. Results presented here for the Climate System Model (CSM) using multiple pseudoproxy noise realizations show that the quantitative differences between the incorrect and corrected results are within the expected variability of the noise realizations. It should also be made clear that the climate reconstruction method used in Smerdon et al. to illustrate the nature of the errors, the Regularized Expectation Maximization method with Ridge Regression (RegEM-Ridge), is known to produce climate reconstructions with considerable variance loss and has been superseded by RegEM-TTLS (TTLS indicates truncated total least squares).

UR - http://www.scopus.com/inward/record.url?scp=84876070276&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876070276&partnerID=8YFLogxK

U2 - 10.1175/JCLI-D-12-00065.1

DO - 10.1175/JCLI-D-12-00065.1

M3 - Comment/debate

AN - SCOPUS:84876070276

VL - 26

SP - 3482

EP - 3484

JO - Journal of Climate

JF - Journal of Climate

SN - 0894-8755

IS - 10

ER -