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author:

Qiu, Bingwen (Qiu, Bingwen.) [1] (Scholars:邱炳文) | Zeng, Canying (Zeng, Canying.) [2] | Tang, Zhenghong (Tang, Zhenghong.) [3] | Chen, Chongcheng (Chen, Chongcheng.) [4] (Scholars:陈崇成)

Indexed by:

EI Scopus SCIE

Abstract:

This paper evaluated the spatiotemporal non-stationarity in the vegetation dynamic based on 1-km resolution 16-day composite Moderate Resolution Imaging Spectroradiometer (MODIS) Enhanced Vegetation Index (EVI) datasets in China during 2001-2011 through a wavelet transform method. First, it revealed from selected pixels that agricultural crops, natural forests, and meadows were characterized by their distinct intra-annual temporal variation patterns in different climate regions. The amplitude of intra-annual variability generally increased with latitude. Second, parameters calculated using a per-pixel strategy indicated that the natural forests had the strongest variation pattern from seasonal to semiannual scales, and the multiple-cropping croplands typically showed almost equal variances distributed at monthly, seasonal, and semiannual scales. Third, spatiotemporal non-stationarity induced from cloud cover was also evaluated. It revealed that the EVI temporal profiles were significantly distorted with regular summer cloud cover in tropical and subtropical regions. Nevertheless, no significant differences were observed from those statistical parameters related to the interannual and interannual components between the de-clouded and the original MODIS EVI datasets across the whole country. Finally, 12 vegetation zones were proposed based on spatiotemporal variability, as indicated by the magnitude of interannual and intra-annual dynamic components, normalized wavelet variances of detailed components from monthly to semiannual scale, and proportion of cloud cover in summer. This paper provides insightful solutions for addressing spatiotemporal non-stationarity by evaluating the magnitude and frequency of vegetation variability using monthly, seasonal, semiannual to interannual scales across the whole study area.

Keyword:

China Enhanced Vegetation Index Pixel reliability Spatiotemporal non-stationary Wavelet transform

Community:

  • [ 1 ] [Qiu, Bingwen]Fuzhou Univ, Key Lab Spatial Data Min & Informat Sharing, Minist Educ, Spatial Informat Res Ctr Fujian Prov, Fuzhou 350002, Fujian, Peoples R China
  • [ 2 ] [Zeng, Canying]Fuzhou Univ, Key Lab Spatial Data Min & Informat Sharing, Minist Educ, Spatial Informat Res Ctr Fujian Prov, Fuzhou 350002, Fujian, Peoples R China
  • [ 3 ] [Chen, Chongcheng]Fuzhou Univ, Key Lab Spatial Data Min & Informat Sharing, Minist Educ, Spatial Informat Res Ctr Fujian Prov, Fuzhou 350002, Fujian, Peoples R China
  • [ 4 ] [Tang, Zhenghong]Univ Nebraska, Community & Reg Planning Program, Lincoln, NE 68588 USA

Reprint 's Address:

  • 邱炳文

    [Qiu, Bingwen]Fuzhou Univ, Key Lab Spatial Data Min & Informat Sharing, Minist Educ, Spatial Informat Res Ctr Fujian Prov, Sci Bldg,Floor 13th,Gongye Rd 523, Fuzhou 350002, Fujian, Peoples R China

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Source :

ENVIRONMENTAL MONITORING AND ASSESSMENT

ISSN: 0167-6369

Year: 2013

Issue: 11

Volume: 185

Page: 9019-9035

1 . 6 7 9

JCR@2013

2 . 9 0 0

JCR@2023

ESI Discipline: ENVIRONMENT/ECOLOGY;

JCR Journal Grade:2

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 27

SCOPUS Cited Count: 30

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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