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Validation of Aura Microwave Limb Sounder stratospheric water vapor measurements by the NOAA frost point hygrometer
Dale F. Hurst,Dale F. Hurst,Alyn Lambert,William G. Read,Sean M. Davis,Sean M. Davis,Karen H. Rosenlof,Emrys G. Hall,Emrys G. Hall,Allen Jordan,Allen Jordan,Samuel J. Oltmans,Samuel J. Oltmans +12 more
- Vol. 2013
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TLDR
Differences between stratospheric water vapor measurements by NOAA frost point hygrometers (FPHs) and the Aura Microwave Limb Sounder (MLS) are evaluated for the period August 2004 through December 2012 at Boulder, Colorado, Hilo, Hawaii, and Lauder, New Zealand.Abstract:
Differences between stratospheric water vapor measurements by NOAA frost point hygrometers (FPHs) and the Aura Microwave Limb Sounder (MLS) are evaluated for the period August 2004 through December 2012 at Boulder, Colorado, Hilo, Hawaii, and Lauder, New Zealand. Two groups of MLS profiles coincident with the FPH soundings at each site are identified using unique sets of spatiotemporal criteria. Before evaluating the differences between coincident FPH and MLS profiles, each FPH profile is convolved with the MLS averaging kernels for eight pressure levels from 100 to 26 hPa (~16 to 25 km) to reduce its vertical resolution to that of the MLS water vapor retrievals. The mean FPH − MLS differences at every pressure level (100 to 26 hPa) are well within the combined measurement uncertainties of the two instruments. However, the mean differences at 100 and 83 hPa are statistically significant and negative, ranging from −0.46 ± 0.22 ppmv (−10.3 ± 4.8%) to −0.10 ± 0.05 ppmv (−2.2 ± 1.2%). Mean differences at the six pressure levels from 68 to 26 hPa are on average 0.8% (0.04 ppmv), and only a few are statistically significant. The FPH − MLS differences at each site are examined for temporal trends using weighted linear regression analyses. The vast majority of trends determined here are not statistically significant, and most are smaller than the minimum trends detectable in this analysis. Except at 100 and 83 hPa, the average agreement between MLS retrievals and FPH measurements of stratospheric water vapor is better than 1%.read more
Citations
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Journal ArticleDOI
Vertical structure of stratospheric water vapour trends derived from merged satellite data.
Michaela I. Hegglin,David A. Plummer,Theodore G. Shepherd,John F. Scinocca,John Anderson,Lucien Froidevaux,Bernd Funke,Dale F. Hurst,A. Rozanov,Joachim Urban,T. von Clarmann,Kaley A. Walker,H. J. Wang,Susann Tegtmeier,Katja Weigel +14 more
TL;DR: An approach to merge satellite data sets with the help of a chemistry-climate model nudged to observed meteorology is presented, calling into question previous estimates of surface radiative forcing based on presumed global long-term increases in water vapour concentrations in the lower stratosphere.
Journal ArticleDOI
The Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database: a long-term database for climate studies
Sean M. Davis,Sean M. Davis,Karen H. Rosenlof,Birgit Hassler,Birgit Hassler,Dale F. Hurst,Dale F. Hurst,William G. Read,Holger Vömel,Henry B. Selkirk,Henry B. Selkirk,Masatomo Fujiwara,Robert Damadeo +12 more
TL;DR: The construction of the Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database, which includes vertically resolved ozone and water vapor data from a subset of the limb profiling satellite instruments operating since the 1980s, is described and the ancillary information stored in SWOOSH that can be used in future studies of water vapor and ozone variability is presented.
Posted ContentDOI
Investigation and amelioration of long-term instrumental drifts in water vapor and nitrous oxide measurements from the Aura Microwave Limb Sounder (MLS) and their implications for studies of variability and trends
Nathaniel J. Livesey,William G. Read,Lucien Froidevaux,Alyn Lambert,Michelle L. Santee,M. J. Schwartz,Luis Millán,Robert Jarnot,P. A. Wagner,Dale F. Hurst,Dale F. Hurst,Kaley A. Walker,Patrick E. Sheese,Gerald E. Nedoluha +13 more
TL;DR: In this article, the authors reviewed the first 15 years of the Microwave Limb Sounder (MLS) measurements from the NASA's 190 GHz subsystem, along with other 190 GHz information, with a focus on their longterm stability, largely based on comparisons with measurements from other sensors.
Journal ArticleDOI
Evaluation of UT/LS hygrometer accuracy by intercomparison during the NASA MACPEX mission
Andrew W. Rollins,Andrew W. Rollins,Troy Thornberry,Troy Thornberry,Ru-Shan Gao,Jessica B. Smith,David S. Sayres,M. R. Sargent,Cornelius Schiller,Martina Krämer,Nicole Spelten,Dale F. Hurst,Dale F. Hurst,Allen Jordan,Allen Jordan,Emrys G. Hall,Emrys G. Hall,Holger Vömel,Glenn S. Diskin,James R. Podolske,Lance E. Christensen,Karen H. Rosenlof,Eric J. Jensen,David W. Fahey,David W. Fahey +24 more
TL;DR: This work intercompares the measurements from the Midlatitude Airborne Cirrus Properties Experiment (MACPEX) and discusses the quality of agreement, suggesting that unrecognized errors in the quantification of instrumental background for some or all of the hygrometers are a likely cause.
Journal ArticleDOI
Recent divergences in stratospheric water vapor measurements by frost point hygrometers and the Aura Microwave Limb Sounder
Dale F. Hurst,Dale F. Hurst,William G. Read,Holger Vömel,Henry B. Selkirk,Henry B. Selkirk,Karen H. Rosenlof,Sean M. Davis,Sean M. Davis,Emrys G. Hall,Emrys G. Hall,Allen Jordan,Allen Jordan,Samuel J. Oltmans,Samuel J. Oltmans +14 more
TL;DR: By mid-2015, the FP–MLS differences at some sites were large enough to exceed the combined accuracy estimates of the FP and MLS measurements, and these rates are similar in magnitude to the 30-year average growth rate of stratospheric water vapor measured by FPs over Boulder.
References
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Journal ArticleDOI
Validation of the Aura Microwave Limb Sounder middle atmosphere water vapor and nitrous oxide measurements
Alyn Lambert,William G. Read,Nathaniel J. Livesey,Michelle L. Santee,Gloria L. Manney,Gloria L. Manney,Lucien Froidevaux,Dien Wu,Michael J. Schwartz,Hugh C. Pumphrey,Carlos Jimenez,Gerald E. Nedoluha,R. E. Cofield,D. T. Cuddy,William H. Daffer,Brian J. Drouin,R. A. Fuller,Robert Jarnot,Brian Knosp,Herbert M. Pickett,V. S. Perun,W. V. Snyder,P. C. Stek,R. P. Thurstans,P. A. Wagner,Joe W. Waters,Kenneth W. Jucks,G. C. Toon,R. A. Stachnik,Peter F. Bernath,Peter F. Bernath,C. D. Boone,Kaley A. Walker,Kaley A. Walker,Joachim Urban,Donal P. Murtagh,James W. Elkins,Elliot Atlas +37 more
TL;DR: In this article, the performance of the version 2.2.2 water vapor and nitrous oxide measurements from the Microwave Limb Sounder (MLS) on the Earth Observing System (EOS) Aura satellite is assessed.
Journal ArticleDOI
Aura Microwave Limb Sounder upper tropospheric and lower stratospheric H2O and relative humidity with respect to ice validation
William G. Read,Alyn Lambert,Julio T. Bacmeister,R. E. Cofield,Lance E. Christensen,D. T. Cuddy,William H. Daffer,Brian J. Drouin,Eric J. Fetzer,Lucien Froidevaux,R. A. Fuller,Robert L. Herman,Robert Jarnot,Jonathan H. Jiang,Yan Jiang,K. K. Kelly,Brian Knosp,L. J. Kovalenko,Nathaniel J. Livesey,Han-Shou Liu,Gloria L. Manney,Herbert M. Pickett,Hugh C. Pumphrey,Karen H. Rosenlof,X. Sabounchi,Michelle L. Santee,Michael J. Schwartz,W. V. Snyder,P. C. Stek,Hui Su,Lawrence L. Takacs,R. P. Thurstans,Holger Vömel,P. A. Wagner,Joe W. Waters,Christopher R. Webster,Elliot M. Weinstock,Dien Wu +37 more
TL;DR: The validation of version 2.2 (v2.2) H2O measurements from the Earth Observing System (EOS) Microwave Limb Sounder (Aura MLS) on the Aura satellite is presented in this article.
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