Long-term change of wet and dry climatic conditions in the southwest karst area of China

Liu, Bingjun; Chen, Cuiliu; Lian, Yanqing; Chen, Junfan; Chen, Xiaohong

doi:10.1016/j.gloplacha.2015.01.009

Cited by 67 publications

(51 citation statements)

References 41 publications

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“…Furthermore, the influence of human activities is also an important factor that cannot be ignored. e karst landform is also an important factor for the drought in Guizhou Province [72]. e karst topography is widely distributed in Guizhou Province, and the arable land is mainly located in the high mountains [73,74].…”

Section: Discussionmentioning

confidence: 99%

Temporal-Spatial Characteristics of Drought in Guizhou Province, China, Based on Multiple Drought Indices and Historical Disaster Records

Cheng

Gao

Chen

et al. 2018

Advances in Meteorology

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Guizhou Province, China, experienced several severe drought events over the period from 1960 to 2013, causing great economic loss and intractable conflicts over water. In this study, the spatial and temporal characteristics of droughts are analyzed with the standard precipitation index (SPI), comprehensive meteorological drought index (CI), and reconnaissance drought index (RDI). Meanwhile, historical drought records are used to test the performance of each index at identifying droughts. All three indices show decreasing annual and autumn trends, with the latter particularly prominent. 29, 30, and 32 drought events were identified during 1960-2013 by the SPI, CI, and RDI, respectively. Continuous drought is more frequent in winter-spring and summer-autumn. ere is a significant increasing trend in drought event frequency, peak, and strength since the start of the 21st century. Drought duration indicated by CI shows longer durations in the higher-elevation region of central and western Guizhou.e corresponding drought severity is high in these regions. SPI and RDI indicate longer drought durations in the lower elevation central and eastern regions of Guizhou Province, where the corresponding drought severity is also very strong. SPI shows an increasing trend in drought duration and drought severity across most of the regions of Guizhou. In general, SPI and RDI show an increasing trend in the western Guizhou Province and a decreasing trend in central and eastern Guizhou. Comparing these three drought indices with historical records, the RDI is found to be more objective and reliable than the SPI and CI when identifying the periods of drought in Guizhou.

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Section: Discussionmentioning

confidence: 99%

Temporal-Spatial Characteristics of Drought in Guizhou Province, China, Based on Multiple Drought Indices and Historical Disaster Records

Cheng

Gao

Chen

et al. 2018

Advances in Meteorology

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“…In addition to highly specialized and endemic species, karsts also represent hotspots of biodiversity, and in Vietnam, karsts are stated to harbor over 2000 plant species, 541 chordates, and 2000 insect species when using relatively crude taxonomic metrics (Tuyet 2001). Caves and Karsts are also essential for various life processes (i.e., Glover and Altringham 2008), and intact forest in the region surrounding the karst may be essential not only to karst roosting species, but also to maintain microclimatic conditions and thus karst habitat structure (van Beynen and van Beynen 2011, Nicolas et al 2012, Liu et al 2015.…”

Section: Miningmentioning

confidence: 99%

Understanding the drivers ofSoutheastAsian biodiversity loss

2017

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Abstract. Southeast Asia (SE Asia) is a known global hotspot of biodiversity and endemism, yet the region is also one of the most biotically threatened. Ecosystems across the region are threatened by an array of drivers, each of which increases the probability of extinction of species in a variety of ecosystems. These issues are symptomatic of the issues that face the global tropics; however, with around 4 billion people in the wider region and the associated pressures on biodiversity, this region may be under some of the greatest levels of biotic threat. Deforestation rates in SE Asia are some of the highest globally, additionally it has the highest rate of mining in the tropics, around the greatest number of hydropower dams under construction, and a consumption of species for traditional medicines which is a threat to biodiversity globally. In this review, the greatest threats to regional biodiversity in the SE Asian region are discussed. Tree-plantations and deforestation represent one of the most imminent threats, and some countries have already lost over half their original forest cover (i.e., the Philippines, parts of Indonesia), with projections of as much as 98% loss for some regions in the coming decade. Hunting and trade represent a significant threat as demand stems not only for food, but also for medicine, for ornamentation, and as a status symbol. Mining represents a frequently overlooked threat, as the Asian region is one of the greatest exporters of limestone and various minerals globally, and the cost of this to biodiversity is not only through the direct loss of areas for mines, but also through the development of roads that further fragment the landscape, the leakage of heavy metals, and the destruction of limestone karsts, which represent global endemicity hotspots. Reservoir construction, wetland drainage, fires, pollution, invasive species, disease, and finally climate change are also considered. Once each issue has been discussed, the overall prognosis of regional biodiversity and priority actions to protect SE Asian biodiversity in the future is discussed.

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“…A: From 1973-1977to 1989-1992B: From 1989B: From -1992B: From to 1999B: From -2001C: From 1999C: From -2001C: From to 2008C: From -2010 station in the different periods. Based on the annual climatic data of 25 weather stations in the study area, utilizing the method of climatic tendency rate (Liu et al, 2015), we analyzed the change tendency of each meteorological element (Tables 3 and 4). Furthermore, some detailed information about annual variation was reported (Figs.…”

Section: Climate Fluctuationmentioning

confidence: 99%