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Titolo:
Spatial distribution and its seasonality of satellite-derived vegetation index (NDVI) and climate in Siberia
Autore:
Suzuki, R; Nomaki, T; Yasunari, T;
Indirizzi:
Natl Res Inst Earth Sci & Disaster Prevent, FRSGC, IGCR Tsukuba, Tsukuba, Ibaraki 3050006, Japan Natl Res Inst Earth Sci & Disaster Prevent Tsukuba Ibaraki Japan 3050006 Remote Sensing Technol Ctr Japan, Data Anal & Res Div, Tokyo, Japan RemoteSensing Technol Ctr Japan Tokyo Japan al & Res Div, Tokyo, Japan Univ Tsukuba, Inst Geosci, Tsukuba, Ibaraki 305, Japan Univ Tsukuba Tsukuba Ibaraki Japan 305 eosci, Tsukuba, Ibaraki 305, Japan
Titolo Testata:
INTERNATIONAL JOURNAL OF CLIMATOLOGY
fascicolo: 11, volume: 21, anno: 2001,
pagine: 1321 - 1335
SICI:
0899-8418(200109)21:11<1321:SDAISO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-RESOLUTION RADIOMETER; METEOROLOGICAL SATELLITE; GLOBAL-SCALE; CALIBRATION; SPACECRAFT; PHENOLOGY; CHANNELS; PRODUCT; NOAA-7;
Keywords:
cluster analysis; ecosystem; GVI; phenology; precipitation; Siberia; taiga; temperature; tundra;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Suzuki, R Natl Res Inst Earth Sci & Disaster Prevent, FRSGC, IGCR Tsukuba,Tsukuba, Ibaraki 3050006, Japan Natl Res Inst Earth Sci & Disaster Prevent Tsukuba Ibaraki Japan 3050006
Citazione:
R. Suzuki et al., "Spatial distribution and its seasonality of satellite-derived vegetation index (NDVI) and climate in Siberia", INT J CLIM, 21(11), 2001, pp. 1321-1335

Abstract

The Normalized Difference Vegetation Index (NDVI) distribution and its seasonal cycle were investigated in relation to temperature and precipitation over Siberia and its surrounding regions. The analyses used 5-year (1987-1991) monthly means. The monthly mean NDVI was calculated from the third-generation monthly Global Vegetation Index (GVI) product; monthly temperature and precipitation at 611 stations were calculated from Global Daily Summary (GDS) data. The 611 stations were classified by cluster analysis into 10 classes basedon the NDVI seasonal cycle (March-October). The geographical distribution characteristics of the NDVI cycle were described using temperature, precipitation and Olson's land-cover type. In northern regions, where tundra vegetation prevails and temperatures and precipitation are low, the amplitude ofthe NDVI seasonal cycle is small. In southern regions, where temperatures are high and there is little precipitation, the seasonal amplitude of the NDVI is small because of the and land type. Forested regions were split intosix classes, each characterized by large amplitudes in the NDVI seasonal cycle. The phenological characteristics of the forest classes were noted. For example, a forest-class localized near Lake Baikal shows higher NDVI values, even with the presence of snow cover in March, compared with other regions. This high NDVI value suggests that the exposed green canopy of the coniferous forest can be observed even when snow is present. In addition, the NDVI peaks at stations near 60 degreesN, where the maximum monthly temperature is around 18 degreesC. This result suggests that the optimum temperature-precipitation environment coincides to the area in Siberia where the maximum monthly temperature is 18 degreesC. Copyright (C) 2001 Royal Meteorological Society.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 15:25:24