AGRICULTURAL DROUGHT
; PROJECTED CHANGES
; PRECIPITATION
; INDEX
; RESPONSES
; STRESS
; MODIS
; DRY
WOS学科分类:
Geography, Physical
; Remote Sensing
WOS研究方向:
Physical Geography
; Remote Sensing
英文摘要:
Understanding climate change and revealing its future paths on a local level is a great challenge for the future. Beside the expanding sets of available climatic data, satellite images provide a valuable source of information. In our study we aimed to reveal whether satellite data are an appropriate way to identify global trends, given their shorter available time range. We used the CARPATCLIM (CC) database (1961-2010) and the MODIS NDVI images (2000-2016) and evaluated the time period covered by both (2000-2010). We performed a regression analysis between the NDVI and CC variables, and a time series analysis for the 1961-2008 and 2000-2008 periods at all data points. The results justified the belief that maximum temperature (TMAX), potential evapotranspiration and aridity all have a strong correlation with the NDVI; furthermore, the short period trend of TMAX can be described with a functional connection with its long period trend. Consequently, TMAX is an appropriate tool as an explanatory variable for NDVI spatial and temporal variance. Spatial pattern analysis revealed that with regression coefficients, macro-regions reflected topography (plains, hills and mountains), while in the case of time series regression slopes, it justified a decreasing trend from western areas (Transdanubia) to eastern ones (The Great Hungarian Plain). This is an important consideration for future agricultural and land use planning; i.e. that western areas have to allow for greater effects of climate change.
1.Univ Debrecen, Dept Phys Geog & Geoinformat, Egyet Ter 1, H-4032 Debrecen, Hungary 2.Hungarian Acad Sci, Inst Nucl Res, Isotope Climatol & Environm Res Ctr ICER, Debrecen, Hungary 3.Pannonia Ltd, Majos I U 55, H-7187 Bonyhad, Hungary 4.Geol & Geophys Inst Hungary, Dept Data Management, Kolumbusz Utca 17-23, H-1145 Budapest, Hungary 5.Hungarian Acad Sci, Inst Geog, Res Ctr Astron & Earth Sci, Budaorsi Str 45, H-1112 Budapest, Hungary 6.Univ Allahabad, Nehru Sci Ctr, K Banerjee Ctr Atmospher & Ocean Studies, IIDS, Allahabad 211002, Uttar Pradesh, India
Recommended Citation:
Szabo, Szilard,Elemer, Laszlo,Kovacs, Zoltan,et al. NDVI dynamics as reflected in climatic variables: spatial and temporal trends - a case study of Hungary[J]. GISCIENCE & REMOTE SENSING,2019-01-01,56(4):624-644