全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地理科学  2014 

1982~2011年北半球中纬度秋季植被绿度变化的主要模态

, PP. 1226-1232

Keywords: 北半球,植被绿度,气候变化,区域差异,秋季

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用系统聚类方法和经验正交函数分解(EOF分析)2种方法,分别提取了北半球中纬度地区1982~2011年秋季(9~11月)归一化差值植被指数(NDVI)变化的主要模态,辨识了植被绿度变化的区域差异;并采用奇异值分解(SVD)的方法,综合时间和空间2个维度上的变异信息,揭示了植被绿度变化的气候背景。结果表明,北半球中纬度秋季植被绿度变化有2种基本模态,一种是持续增加模态(模态I),该模态广泛分布于北美大陆、亚欧大陆的北半部(大约在55°N以北)和东西两端,NDVI平均增速为0.014/10a;另一种是趋势转折模态(模态II),NDVI先增加,后减少,转折点大致出现在1994年,该模态主要出现在亚欧大陆中部,NDVI变化的平均速率分别是0.027/10a和-0.017/10a,其中以40°E~80°E最为典型。植被绿度变化与温度变化的时空特征基本一致。模态I区域的温度变化以持续性升高为主要特征,模态II区域的温度变化则以先增加后降低为主要特征,转折年份与NDVI变化的转折年份基本一致。SVD分析的第一模态NDVI与温度的时间系数相关系数为0.82,第二模态为0.92。由此表明,植被绿度变化主导模态可能由温度变化模态所致,在区域-大洲尺度上,温度变化的区域差异导致了秋季植被绿度变化的区域差异。

References

[1]  Fischlin A,Midgley G F,Price J T,et al.Ecosystems,their properties,goods,and services [C]//M L Parry,O F Canziani,J P Palutik of,P J et al.Climate Change 2007: Impacts,Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.Cambridge,Cambridge University Press,2007:211-272.
[2]  Park H-S,Sohn B J.Recent trends in changes of vegetation over East Asia coupled with temperature and rainfall variations[J].Journal of Geophysical Research,2010,115,D14101,doi:10.1029/2009JD012752.
[3]  Piao S L,Wang X H,Ciais P,et al.Changes in satellite-derived vegetation growth trend in temperate and boreal Eurasia from 1982to 2006[J].Global Change Biology,2011,17(10),3228-3239.
[4]  Mao J F,Shi X Y,Thornton P E,et al.Causes of spring vegetation growth trends in the northern mid-high latitudes from 1982 to 2004[J].Environmental Research Letters,2012,7,014010,doi:10.1088/1748-9326/7/1/014010
[5]  Wang X H,Piao S L,Ciais P,et al.Spring temperature change and its implication in the change of vegetation growth in North America from 1982 to 2006[J]. Proceedings of the National Academy of Sciences of the United States of America,2011,108(4):1240-1245.
[6]  Jeong S-J,Ho C-H,Gim H-J,et al. Phenology shifts at start vs.end of growing season in temperate vegetation over the Northern Hemisphere for the period 1982-2008[J].Global Change Biology,2011,17:2385-2399.
[7]  Peng S S,Chen A P,LU L,et al. Recent change of vegetation growth trend in China[J]. Environmental Research Letters,2011,6,044027,doi:10.1088/1748-9326/6/4/044027
[8]  Fang J,Piao S L,He J S,et al. Increasing terrestrial vegetation activity in China,1982-1999[J].Sci China Ser C,2004,47(3):229-240.
[9]  李洪权,范广洲,周定文,等.青藏高原春季植被变化特征及其对夏季气温的影响[J].地理科学,2008,28(2):259~265.
[10]  Foley J A,Levis S,Costa M H.Incorporating dynamic vegetation cover within global climate models[J]. Ecological Applications,2000,10:1620-1632.
[11]  Mahmood R.Pielke R A,Hubbard K G,et al.Impacts of land use/land cover change on climate and future research priorities[J].Bulletin Of The American Meteorological Society,2010,91(1):37-46.
[12]  Baret F,Guyot G.Potentials and limits of vegetation indices for LAI and APAR assessment[J].Remote Sensing of Environment,1991,35(2-3):161-173.
[13]  Gutman G,Ignatov A.The derivation of the green vegetation fraction from NOAA/AVHRR data for use in numerical weather prediction models[J].International Journal of Remote Sensing,1998,19(8):1533-1543.
[14]  Myneni R B,Hall F B,Sellers P J,et al.The interpretation of spectral vegetation indices[J].IEEE Trans GeoSci Remote Sensing,1995,33:481-486.
[15]  Tucker C J,Slayback D A,Pinzon J E,et al.Higher northern latitude normalized difference vegetation index and growing season trends from 1982 to 1999[J].International Journal of Biometeorology,2001,45:184-190.
[16]  Zhou L,Kaufmann R K,Tian Y,et al. Relation between interannual variations in satellite measures of northern forest greenness and climate between 1982 and 1999[J]. Journal of Geophysical Research,2003,108(D1):4004.
[17]  Huete A,Didan K,Miura T,et al.Overview of the radiometric and biophysical performance of the MODIS vegetation indices[J].Remote Sensing of Environment,2002,83(1-2):195-213.
[18]  Fensholt R and Proud S R.Evaluation of Earth Observation based global long term vegetation trends—Comparing GIMMS and MODIS global NDVI time series[J].Remote Sensing of Environment,2012,119:131-147.
[19]  张清雨,赵东升,吴绍洪,等.基于生态分区的内蒙古地区植被覆盖变化及其影响因素研究[J].地理科学,2013,33(5):594~601.
[20]  包刚,包玉海,覃志豪,等.近10 年蒙古高原植被覆盖变化及其对气候的季节响应[J].地理科学,2013,33(5):613~621.
[21]  南颖,刘志锋,董叶辉.2000~2008 年长白山地区植被覆盖变化对气候的响应研究[J].地理科学,2010,30(6):921~928.
[22]  Mitchell and Jones.An improved method of constructing a databaseof monthly climate observations and associated high-resolution grids[J]. International Journal of Climatology,2005,25:693-712.
[23]  Johnson R A and Wichern D W. 陆璇(译).实用多元统计分析[M].北京:清华大学出版社,2001,553~563.
[24]  房之芳,朱克云,范广洲,等.气候物理过程研究[M].北京:气象出版社,2006:209~212.
[25]  徐希孺.遥感物理[M].北京:北京大学出版社,2005.
[26]  郭笑怡,张洪岩.生态地理分区框架下的大兴安岭植被动态研究[J].地理科学,2013,33(2):181~188.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133