Distribution of Landscape Types in the Global Historical Climatology Network

Earth Interactions

Laure M.Montandon¹ 

关键词: Surface temperatures;    Land cover;    GHCN;    Temperature trends;   

DOI  :  10.1175/2010EI371.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

Abstract The Global Historical Climate Network version 2 (GHCNv.2) surface temperature dataset is widely used for reconstructions such as the global average surface temperature (GAST) anomaly. Because land use and land cover (LULC) affect temperatures, it is important to examine the spatial distribution and the LULC representation of GHCNv.2 stations. Here, nightlight imagery, two LULC datasets, and a population and cropland historical reconstruction are used to estimate the present and historical worldwide occurrence of LULC types and the number of GHCNv.2 stations within each. Results show that the GHCNv.2 station locations are biased toward urban and cropland (>50% stations versus 18.4% of the world’s land) and past century reclaimed cropland areas (35% stations versus 3.4% land). However, widely occurring LULC such as open shrubland, bare, snow/ice, and evergreen broadleaf forests are underrepresented (14% stations versus 48.1% land), as well as nonurban areas that have remained uncultivated in the pa...

【 授权许可】

Unknown