Based on MODIS NDVI and climate datasets during 2000-2014, used linear regression and correlation analysis, the spatiotemporal variations of NDVI in Gansu and their linkage with regional climate change were analyzed. The results showed that in the last 15 years, average NDVI of growing season, spring, summer and autumn all showed an increasing trend. The trend of summer was the most significant at regional scale, with a rate of 0.071/10 a (P<0.01). At pixel scale, the area of increasing trend in growing season was the largest, area with excellent (P<0.01) and significant (0.01 < P < 0.05) increasing trend covered 50.03% and 14.44% of the whole vegetation area respectively. Precipitation and humid index are the most important factors of vegetation growth in growing season and summer. Temperature, precipitation and humid index played equal roles in spring, temperature was the most important driving factor in autumn. The lag effect of temperature was obvious to NDVI in growing season. The precipitation and humid index in last season had effect on the vegetation growth of the coming season.
Cao Bo
,
Zhang Bo
,
Ma Bin
,
Wang Guoqiang
,
Tang Min
,
Zhang Yaozong
,
Jia Yanqing
. Spatial and Temporal Variations of NDVI in Gansu, China from 2000 to 2014[J]. Journal of Desert Research, 2018
, 38(2)
: 418
-427
.
DOI: 10.7522/j.issn.1000-694X.2016.00171
[1] 朴世龙,方精云.1982-1999年我国陆地植被活动对气候变化响应的季节差异[J].地理学报,2003,58(11):119-125.
[2] 何月,樊高峰,张小伟,等.浙江省植被NDVI动态及其对气候的响应[J].生态学报,2012,32(14):4352-4362.
[3] Seddon A W R,Macias-Fauria M,Long P R,et al.Sensitivity of global terrestrial ecosystems to climate variability[J].Nature,2016,531(7593):229-232.
[4] 阿迪来·乌甫,玉素甫江·如素力,热伊莱·卡得尔,等.新疆焉耆盆地LAI反演及空间分布特征[J].中国沙漠,2016,36(5):1340-1347.
[5] 方精云,朴世龙,贺金生,等.近20年来中国植被活动在增强[J].中国科学:C辑,2003,33(6):554-565.
[6] Myneni R B,Keeling C D,Tucker C J,et al.Increased plant growth in the northern high latitudes from 1981 to 1991[J].Nature,1997,386(6626):698-702.
[7] 李双双,延军平,万佳.近10年陕甘宁黄土高原区植被覆盖时空变化特征[J].地理学报,2012,67(7):960-970.
[8] Piao S L,Wang X H,Ciais P,et al.Changes in satellite-derived vegetation growth trend in temperate and boreal Eurasia from 1982 to 2006[J].Global Change Biology,2011,17(10):3228-3239.
[9] Mohammat A,Wang X H,Xu X T,et al.Drought and spring cooling induced recent decrease in vegetation growth in Inner Asia[J].Agriculture and Forest Meteorology,2013,178-179:21-30.
[10] 杜加强,贾尔恒·阿哈提,赵晨曦,等.1982-2012年新疆植被NDVI的动态变化及其对气候变化和人类活动的响应[J].应用生态学报,2015,26(12):3567-3578.
[11] 崔丹丹,张耀南,陈广庭.2001-2010年甘肃省植被覆盖的时空变化[J].中国沙漠,2014,34(4):1161-1166.
[12] 杨尚武,张勃.基于SPOT NDVI的甘肃河东植被覆盖变化及其对气候因子的响应[J].生态学杂志,2014,33(2):455-461.
[13] Yang X M,Liu S Z,Yang T B,et al.Spatial-temporal dynamics of desert vegetation and its responses to climatic variations over the last three decades:a case study of Hexi region in Northwest decades:a case study of Hexi region in Northwest China[J].Journal of Arid Land,2016,8(4):556-568.
[14] 李栋梁,刘德祥.甘肃气候[M].北京:气象出版社,2000:3-17.
[15] 戴声佩,张勃,王海军,等.中国西北地区植被时空演变特征及其对气候变化的响应[J].遥感技术与应用,2010,25(1):69-75.
[16] 穆少杰,李建龙,陈奕兆,等.2001-2010年内蒙古植被覆盖度时空变化特征[J].地理学报,2012,67(9):1255-1268.
[17] 何慧娟,卓静,王娟,等.陕西省退耕还林植被覆盖度与湿润指数的变化关系[J].生态学报,2016,36(2):1-9.
[18] Allen R G,Pereira L S,Raes D,et al.Crop Evapotranspiration:Guidelines for Computing Crop Water Requirements[R].Rome,Italy:FAO,1998:56.
[19] 黄亮,高苹,谢小萍,等.全球增暖背景下中国干湿气候带变化规律研究[J].气象科学,2013,33(5):570-576.
[20] 王林林,刘普幸,王允.近14年来柴达木盆地NDVI时空变化及其影响因素[J].生态学杂志,2015,34(6):1713-1722.
[21] 韦振锋,王德光,张翀,等.1999-2010年中国西北地区植被覆盖对气候变化和人类活动的响应[J].中国沙漠,2014,34(6):1665-1670.
[22] 宋怡,马明国.基于SPOT VEGETATION数据的中国西北植被覆盖变化分析[J].中国沙漠,2007,27(1):89-93.
[23] 信忠保,许炯心,郑伟.气候变化和人类活动对黄土高原植被覆盖变化的影响[J].中国科学D辑:地球科学,2007,37(11):1504-1514.
[24] 黄海涛,常学礼,岳喜元,等.科尔沁沙地不同沙地景观区植被指数对水热因素响应[J].中国沙漠,2016,36(1):40-49.
[25] 宋怡,马明国.基于GIMMS AVHRR NDVI数据的中国寒旱区植被动态及其与气候因子的关系[J].遥感学报,2008,12(3):499-505.
[26] Zhao X,Tan K,Zhao S,et al.Changing climate affects vegetation growth in the arid region of the northwestern China[J].Journal of Arid Environments, 2011,75(10):946-952.