Arid
Recent trends in the climate of Namaqualand, a megadiverse arid region of South Africa
Davis, Claire L.1; Hoffman, M. Timm2; Roberts, Wesley3
通讯作者Davis, Claire L.
来源期刊SOUTH AFRICAN JOURNAL OF SCIENCE
ISSN0038-2353
EISSN1996-7489
出版年2016
卷号112期号:3-4页码:89-97
英文摘要

Namaqualand is especially vulnerable to future climate change impacts. Using a high-resolution (0.5 degrees x0.5 degrees) gridded data set (CRU TS 3.1) and individual weather station data, we demonstrated that temperatures as well as frequency of hot extremes have increased across this region. Specifically, minimum temperatures have increased by 1.4 degrees C and maximum temperatures by 1.1 degrees C over the last century. Of the five weather stations analysed, two showed evidence of a significant increase in the duration of warm spells of up to 5 days per decade and a reduction in the number of cool days (TX10P) by up to 3 days per decade. In terms of rainfall, we found no clear evidence for a significant change in annual totals or the frequency or intensity of rainfall events. Seasonal trends in rainfall did, however, demonstrate some spatial variability across the region. Spatial trends in evapotranspiration obtained from the 8-day MOD16 ET product were characterised by a steepening inland-coastal gradient where areas along the coastline showed a significant increase in evapotranspiration of up to 30 mm per decade, most notably in spring and summer. The increase in temperature linked with the increases in evapotranspiration pose significant challenges for water availability in the region, but further research into changes in coastal fog is required in order for a more reliable assessment to be made. Overall, the results presented in this study provide evidence-based information for the management of climate change impacts as well as the development of appropriate adaptation responses at a local scale.


英文关键词climate extreme trend analysis temperature rainfall evapotranspiration
类型Article
语种英语
国家South Africa ; Zambia
收录类别SCI-E
WOS记录号WOS:000373680800014
WOS关键词DAILY PRECIPITATION ; TEMPERATURE TRENDS ; SUCCULENT KAROO ; DYNAMICS ; VULNERABILITY ; MAXIMUM
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/196526
作者单位1.CSIR, Nat Resources & Environm, POB 320, ZA-7599 Stellenbosch, South Africa;
2.Univ Cape Town, Dept Biol Sci, ZA-7925 Cape Town, South Africa;
3.BioCarbon Partners, Lusaka, Zambia
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GB/T 7714
Davis, Claire L.,Hoffman, M. Timm,Roberts, Wesley. Recent trends in the climate of Namaqualand, a megadiverse arid region of South Africa[J],2016,112(3-4):89-97.
APA Davis, Claire L.,Hoffman, M. Timm,&Roberts, Wesley.(2016).Recent trends in the climate of Namaqualand, a megadiverse arid region of South Africa.SOUTH AFRICAN JOURNAL OF SCIENCE,112(3-4),89-97.
MLA Davis, Claire L.,et al."Recent trends in the climate of Namaqualand, a megadiverse arid region of South Africa".SOUTH AFRICAN JOURNAL OF SCIENCE 112.3-4(2016):89-97.
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