TITLE

Regional Contrasts of the Warming Rate over Land Significantly Depend on the Calculation Methods of Mean Air Temperature

AUTHOR(S)
Wang, Kaicun; Zhou, Chunlüe
PUB. DATE
July 2015
SOURCE
Scientific Reports;7/24/2015, p12324
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Global analyses of surface mean air temperature (Tm) are key datasets for climate change studies and provide fundamental evidences for global warming. However, the causes of regional contrasts in the warming rate revealed by such datasets, i.e., enhanced warming rates over the northern high latitudes and the 'warming hole' over the central U.S., are still under debate. Here we show these regional contrasts depend on the calculation methods of Tm. Existing global analyses calculate Tm from daily minimum and maximum temperatures (T2). We found that T2 has a significant standard deviation error of 0.23 °C/decade in depicting the regional warming rate from 2000 to 2013 but can be reduced by two-thirds using Tm calculated from observations at four specific times (T4), which samples diurnal cycle of land surface air temperature more often. From 1973 to 1997, compared with T4, T2 significantly underestimated the warming rate over the central U.S. and overestimated the warming rate over the northern high latitudes. The ratio of the warming rate over China to that over the U.S. reduces from 2.3 by T2 to 1.4 by T4. This study shows that the studies of regional warming can be substantially improved by T4 instead of T2.
ACCESSION #
108544434

 

Related Articles

  • Observation-Time-Dependent Biases and Departures for Daily Minimum and Maximum Air Temperatures. Janis, Michael J. // Journal of Applied Meteorology;May2002, Vol. 41 Issue 5, p588 

    Non-calendar-day observations of 24-h minimum and maximum air temperatures can be considerably different from calendar-day or midnight observations. This paper examines the influence of time-of-observation on 24-h temperature observations. Diurnal minimum and maximum temperatures measured at...

  • The impact of climate change on the snow cover pattern in Estonia. Jaagus, Jaak // Climatic Change;May/Jun97, Vol. 36 Issue 1/2, p65 

    Deals with problems of temporal and spatial variability of snow cover duration, of correlation between snow and winter mean air temperature pattern and of the impact of climate change on the snow pattern in Estonia. Time series of raster images; Determination of general regularities of snow...

  • Relationship between Holocene climate variations over southern Greenland and eastern Baffin Island and synoptic circulation pattern. Fréchette, B.; de Vernal, A. // Climate of the Past;2009, Vol. 5 Issue 3, p347 

    Lake pollen records from southwest Greenland and eastern Baffin Island show strong regionalism in climate trends of the last 7000 cal years. July surface air temperature reconstructions from pollen indicate larger amplitude cooling in southwest Greenland (>3.0°C) than in eastern Baffin Island...

  • Variation trends of natural vegetation net primary productivity in China under climate change scenario. ZHAO Dong-sheng; WU Shao-hong; YIN Yun-he // Yingyong Shengtai Xuebao;Apr2011, Vol. 22 Issue 4, p897 

    Based on the widely used Lundé„„Potsdamé„„Jena Dynamic Global Vegetation Model (LPJ) for climate change study, and according to the features of natural environment in China, the operation mechanism of the model was adjusted, and the parameters were modified. With the modified LPJ model...

  • Responses of vegetations in Minqin desert area to climate change. Chang Zhao-feng; Han Fu-gui; Zhong Sheng-nian // Yingyong Shengtai Xuebao;May2012, Vol. 23 Issue 5, p1210 

    Based on the phenological data in 1974-2009 and the plot vegetation data in 2002-2010 as well as the meteorological data, this paper analyzed the responses of the vegetations in Minqin desert area to climate change. In 1961-2010, the air temperature and air humidity in the study area increased,...

  • TopoSCALE: deriving surface fluxes from gridded climate data. Fiddes, J.; Gruber, S. // Geoscientific Model Development Discussions;2013, Vol. 6 Issue 2, p3381 

    Simulation of land surface processes is problematic in heterogeneous terrain due to the the high resolution required of model grids to capture strong lateral variability caused by e.g. topography and the lack of accurate meteorological forcing data at the site or scale it is required. Gridded...

  • SPATIAL-TEMPORAL PATTERN OF VEGETATION INDEX CHANGE AND THE RELATIONSHIP TO LAND SURFACE TEMPERATURE IN ZOIGE. Chen, Z.; Jiang, W. G.; Tang, Z. H.; Jia, K. // International Archives of the Photogrammetry, Remote Sensing & S;2016, Vol. 41 Issue B3, p849 

    The Zoige wetland is the largest alpine peat wetland in China, and it has been degrading since 1960s. MODIS Enhance Vegetation Index (EVI) and Land Surface Temperature (LST) products in late august from 2000 to 2014 were employed to explore vegetation index and land surface temperature change...

  • Cycles and shifts: 1,300 years of multi-decadal temperature variability in the Gulf of Alaska. Wilson, Rob; Wiles, Greg; D'Arrigo, Rosanne; Zweck, Chris // Climate Dynamics;Apr2007, Vol. 28 Issue 4, p425 

    The Gulf of Alaska (GOA) is highly sensitive to shifts in North Pacific climate variability. Here we present an extended tree-ring record of January–September GOA coastal surface air temperatures using tree-ring width data from coniferous trees growing in the mountain ranges along the...

  • Hierarchical evaluation of IPCC AR4 coupled climate models with systematic consideration of model uncertainties. Min, Seung-Ki; Hense, Andreas // Climate Dynamics;Dec2007, Vol. 29 Issue 7/8, p853 

    The capability of reproducing observed surface air temperature (SAT) changes for the twentieth century is assessed using 22 multi-models which contribute to the Intergovernmental Panel on Climate Change Fourth Assessment Report. A Bayesian method is utilized for model evaluation by which model...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics