Katharine M. Willett
Met Office
GeologyHumidityRelative humidityClimatologyAtmospheric sciences
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Publications 11
#1Peter W. Thorne (MU: Maynooth University)H-Index: 40
#2Howard J. Diamond (NOAA: National Oceanic and Atmospheric Administration)H-Index: 8
Last. Kate M. Willett (Met Office)H-Index: 11
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There is overwhelming evidence that the climate system has warmed since the instigation of instrumental meteorological observations. The Fifth Assessment Report of the Intergovernmental Panel on Climate Change concluded that the evidence for warming was unequivocal. However, owing to imperfect measurements and ubiquitous changes in measurement networks and techniques, there remain uncertainties in many of the details of these historical changes. These uncertainties do not call into question the ...
6 CitationsSource
#1Kate M. WillettH-Index: 11
#2David I. BerryH-Index: 21
Last. Adrian SimmonsH-Index: 48
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6 Citations
#2Victor VenemaH-Index: 16
Last. Colin M. GallagherH-Index: 14
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#1Peter W. ThorneH-Index: 40
#2J. H. LawrimoreH-Index: 2
Last. E. M. ScottH-Index: 1
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The aim of International Surface Temperature Initiative is to create an end-to-end process for analysis of air temperature data taken over the land surface of the Earth. The foundation of any analysis is the source data. Land surface air temperature records have traditionally been stored in local, organizational, national and international holdings, some of which have been available digitally but many of which are available solely on paper or as imaged files. Further, economic and geopolitical r...
1 CitationsSource
#1P. KlasonH-Index: 2
A new challenge for meteorological measurements : The meteoMet project-Metrology for meteorology
3 Citations
#1Thomas C. Peterson (NOAA: National Oceanic and Atmospheric Administration)H-Index: 53
#2Katharine M. Willett (Met Office)H-Index: 11
Last. Peter W. Thorne (NCSU: North Carolina State University)H-Index: 40
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[1] The temperature of the surface atmosphere over land has been rising during recent decades. But surface temperature, or, more accurately, enthalpy which can be calculated from temperature, is only one component of the energy content of the surface atmosphere. The other parts include kinetic energy and latent heat. It has been advocated in certain quarters that ignoring additional terms somehow calls into question global surface temperature analyses. Examination of all three of these component...
26 CitationsSource
#1Christine Achberger (University of Gothenburg)H-Index: 12
#2Steven A. Ackerman (UW: University of Wisconsin-Madison)H-Index: 40
Last. John I. Antonov (NOAA: National Oceanic and Atmospheric Administration)H-Index: 6
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Several large-scale climate patterns influenced climate conditions and weather patterns across the globe during 2010. The transition from a warm El Nino phase at the beginning of the year to a cool La Nina phase by July contributed to many notable events, ranging from record wetness across much of Australia to historically low Eastern Pacific basin and near-record high North Atlantic basin hurricane activity. The remaining five main hurricane basins experienced below- to well-below-normal tropic...
81 CitationsSource
#1Katharine M. Willett (UEA: University of East Anglia)H-Index: 11
#2Philip D. Jones (UEA: University of East Anglia)H-Index: 129
Last. Nathan P. Gillett (UEA: University of East Anglia)H-Index: 51
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Observed changes in the HadCRUH global land surface specific humidity and CRUTEM3 surface temperature from 1973 to 1999 are compared to CMIP3 archive climate model simulations with 20th Century forcings. Observed humidity increases are proportionately largest in the Northern Hemisphere, especially in winter. At the largest spatio-temporal scales moistening is close to the Clausius–Clapeyron scaling of the saturated specific humidity (~7% K − 1). At smaller scales in water-limited regions, change...
46 CitationsSource
#2Peter W. ThorneH-Index: 40
Last. Nathan P. GillettH-Index: 51
view all 4 authors...
#2Philip D. JonesH-Index: 129
Last. Peter W. ThorneH-Index: 40
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Water vapor constitutes the most significant greenhouse gas, is a key driver of many atmospheric processes, and hence, is fundamental to understanding the climate system. It is a major factor in human “heat stress,” whereby increasing humidity reduces the ability to stay cool. Until now no truly global homogenized surface humidity dataset has existed with which to assess recent changes. The Met Office Hadley Centre and Climatic Research Unit Global Surface Humidity dataset (HadCRUH), described h...
151 CitationsSource