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Title

Spring temperature change and its implication in the change of vegetation growth in North America from 1982 to 2006

Publication Year

2011

Author(s)
  • Wang, Xuhui
  • Piao, Shilong
  • Ciais, Philippe
  • Li, Junsheng
  • Friedlingstein, Pierre
  • Koven, Charlie
  • Chen, Anping
Source
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Volume: 108 Issue: 4 Pages: 1240-1245 Published: 2011
ISSN
0027-8424
Abstract

Understanding how vegetation growth responds to climate change is a critical requirement for projecting future ecosystem dynamics. Parts of North America (NA) have experienced a spring cooling trend over the last three decades, but little is known about the response of vegetation growth to this change. Using observed climate data and satellite-derived Normalized Difference Vegetation Index (NDVI) data from 1982 to 2006, we investigated changes in spring (April-May) temperature trends and their impact on vegetation growth in NA. A piecewise linear regression approach shows that the trend in spring temperature is not continuous through the 25-year period. In the northwestern region of NA, spring temperature increased until the late 1980s or early 1990s, and stalled or decreased afterwards. In response, a spring vegetation greening trend, which was evident in this region during the 1980s, stalled or reversed recently. Conversely, an opposite phenomenon occurred in the northeastern region of NA due to different spring temperature trends. Additionally, the trends of summer vegetation growth vary between the periods before and after the turning point (TP) of spring temperature trends. This change cannot be fully explained by summer drought stress change alone and is partly explained by changes in the trends of spring temperature as well as those of summer temperature. As reported in previous studies, summer vegetation browning trends have occurred in the northwestern region of NA since the early 1990s, which is consistent with the spring and summer cooling trends in this region during this period.

Author Keyword(s)
    KeyWord(s) Plus
    • DROUGHT SEVERITY INDEX
    • NET PRIMARY PRODUCTION
    • TERRESTRIAL ECOSYSTEMS
    • SATELLITE DATA
    • CLIMATE-CHANGE
    • PHOTOSYNTHETIC TRENDS
    • ATMOSPHERIC CO2
    • CARBON-DIOXIDE
    • FOREST
    • BOREAL
    ESI Discipline(s)
    • Multidisciplinary
    Web of Science Category(ies)
    • Multidisciplinary Sciences
    Adress(es)

    [Wang, Xuhui; Piao, Shilong] Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China; [Ciais, Philippe; Friedlingstein, Pierre] Univ Versailles St Quentin En Yvelines, Lab Sci Climat & Environm, Unite Mixte Rech Commissariat Energie Atom, Ctr Natl Rech Sci,CE Orme des Merisiers, F-91191 Gif Sur Yvette, France; [Li, Junsheng] Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China; [Friedlingstein, Pierre] Univ Bristol, Quantifying & Understanding Earth Syst QUEST, Dept Earth Sci, Bristol BS8 1RJ, Avon, England; [Koven, Charlie] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA; [Chen, Anping] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA

    Reprint Adress

    Piao, SL (reprint author), Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China.

    Country(ies)
    • France
    • People's Republic of China
    • United Kingdom
    • United States
    CNRS - Adress(es)
    • Laboratoire des sciences du climat et de l'environnement (LSCE), UMR8212
    Accession Number
    WOS:000286594800011
    uid:/NKTSGQ38
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