Long-term trends in daily temperature extremes over Mongolia

Dulamsuren, Dashkhuu; Kim, Jong Pil; Chun, Jong Ahn; Lee, Woo-Seop

doi:10.1016/j.wace.2014.11.003

Cited by 66 publications

(37 citation statements)

References 6 publications

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“…Semi-arid Mongolia is a highly continental region characterized by harsh/long winters and hot/short summers (Dashkhuu et al, 2015). Mongolia is located at the interface of three major atmospheric circulation systems controlling the regional climate (Fig.…”

Section: Geographical Setting and Samplingmentioning

confidence: 99%

Leaf wax n-alkane pattern and compound-specific δ13C of plants and topsoils from semi-arid Mongolia

Struck¹,

Bliedtner²,

Strobel³

et al. 2019

Preprint

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Abstract. n-Alkane pattern and their compound-specific &#948;13C signatures are valuable proxies for paleoenvironmental reconstructions. So far, their potential has not been investigated in semi-arid to arid regions. We have therefore analysed the leaf wax n-alkanes and their compound-specific &#948;13C of five plant species (Poaceae, Cyperaceae, Artemisia spp., Caragana spp. and Larix sp.), and topsoils (0&#8211;5&#8201;cm) along two transects in central and southern Mongolia. Grasses depict a distinct dominance of the n-C31 homologue, whereas Caragana spp. and Artemisia spp. are dominated by n-C29. Larix sp. is characterized by the mid-chain n-alkanes n-C23 and n-C25. From plant to soil, n-alkane homologue pattern show the potential to differentiate between grass covered sites from those covered by Caragana spp. n-Alkane concentrations and OEP values of the topsoils are distinctly influenced by mean annual temperature, mean annual precipitation and aridity, likely reflecting the degree of n-alkane degradation and biomass production. In contrast, the n-alkane average chain-length and the n-alkane ratio (n-C31&#8201;/&#8201;n-C29&#8201;+&#8201;n-C31) are not affected by climatic parameters. The compound-specific &#948;13C signatures are strongly corelated to climate, showing a significant enrichment with increasing aridity, indicating the effect of water use efficiency. Our calibration results suggest that long-chain n-alkanes and their compound-specific &#948;13C signatures have great potential to reconstruct paleoenvironmental and -climatic conditions when used in sediment archives from Mongolia.

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Section: Geographical Setting and Samplingmentioning

confidence: 99%

Leaf wax n-alkane pattern and compound-specific δ13C of plants and topsoils from semi-arid Mongolia

Struck¹,

Bliedtner²,

Strobel³

et al. 2019

Preprint

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show abstract

“…One is relative by using temperature percentiles, and the other is absolute temperature threshold values. Most of the studies related to temperatures extremes are based on percentile criterion (Manton et al 2001;Klein Tank and Können 2003;Zhai and Pan 2003;Alexander et al 2006;Kenawy et al 2011;Vincent et al 2011: Fan 2014Labajo et al 2014;Buric et al 2014;Dashkhuu et al 2015). Percentile thresholds are more evenly distributed in space and hence meaningful for every region as compared to absolute thresholds.…”

Section: Methodsmentioning

confidence: 99%

“…Spatial and temporal variations in daily temperature extremes have been studied by many researchers for the different regions of the world (Manton et al 2001;Klein Tank and Können 2003;Zhai and Pan 2003;Kostopoulou and Jones 2005;Alexander et al 2006;Brown et al 2008;Kenawy et al 2011;Vincent et al 2011: Zhou andRen 2012;Donat et al 2013;Ye et al 2014;Labajo et al 2014;Dashkhuu et al 2015). Most of these studies have found significant increase in maximum temperature extremes and significant decrease in minimum temperature extremes.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variation in daily temperature indices in summer and winter seasons over India (1969–2012)

Kumar

Jaswal

Mohapatra

et al. 2016

Theor Appl Climatol

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Spatial and temporal variations in summer and winter extreme temperature indices are studied by using daily maximum and minimum temperatures data from 227 surface meteorological stations well distributed over India for the period 1969-2012. For this purpose, time series for six extreme temperature indices namely, hot days (HD), very hot days (VHD), extremely hot days (EHD), cold nights (CN), very cold nights (VCN), and extremely cold nights (ECN) are calculated for all the stations. In addition, time series for mean extreme temperature indices of summer and winter seasons are also analyzed. Study reveals high variability in spatial distribution of threshold temperatures of extreme temperature indices over the country. In general, increasing trends are observed in summer hot days indices and decreasing trends in winter cold night indices over most parts of the country. The results obtained in this study indicate warming in summer maximum and winter minimum temperatures over India. Averaged over India, trends in summer hot days indices HD, VHD, and EHD are significantly increasing (+1.0, +0.64, and +0.32 days/decade, respectively) and winter cold night indices CN, VCN, and ECN are significantly decreasing (−0.93, −0.47, and −0.15 days/decade, respectively). Also, it is observed that the impact of extreme temperature is higher along the west coast for summer and east coast for winter.

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“…Christidis et al (2005) and Stott (2016) indicated that the maximum and minimum temperature have been increasing at the global scale, with an elevating frequency and intensity of weather extremes [16,17]. Dashkhuu et al (2015) analyzed various indices to investigate recent changes in the annual frequencies of extreme temperature events in Mongolia, showing an apparent increase in summer days, as well as an appreciable decrease in frost days [18]. Ruml et al (2017) analyzed spatiotemporal changes of temperature extremes in Serbia based on 18 Expert Team on Climate Change Detection and Indices (ETCCDI) indices using daily minimum and maximum temperature observations from 26 meteorological stations over the period 1961-2010.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Patterns of Extreme Temperature across the Huai River Basin, China, during 1961–2014, and Regional Responses to Global Changes

et al. 2018

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Global warming and its relevant effects have aroused increasing human concerns in recent decades. These anomalies are likely influencing vegetation dynamics and ecosystem stability. This paper aims to dissect extreme temperature variations in both space and time, and related regional responses to global warming in the Huai River Basin. Using the daily maximum and minimum air temperature at 153 stations across the Huai River Basin, China, covering the period of 1961-2014, trends and relations amongst extreme air temperature indices were analyzed, and regional responses of the Huai River Basin to global warming process were also investigated. The results indicated that: (1) widespread increasing trends can be observed in maximum and minimum air temperature, with the largest increasing magnitude of 0.4 • C per decade and 1.3 • C per decade, respectively. The minimum air temperature regimes have a larger increasing magnitude than the maximum air temperatures. (2) There is an increasing trend in the extreme maximum temperature indices, and the increasing rates of TN90p and TR20 are greater than those of the other extreme maximum temperature indices. However, the extreme minimum temperature indices, except for consecutive icy days (CID), show significant decreasing trends. The growing season length (GSL) would increase due to the joint action of (i) an increase in maximum temperature indices, and (ii) a decrease in minimum temperatures indices. Although increases in the GSL would be beneficial for increasing the growing time of crops, a decreased extreme minimum temperature and increased extreme maximum temperature may reduce the winter wheat yield. (3) Extreme low temperature indices show a larger changing magnitude than the extreme high temperature indices. Temporally, a larger changing magnitude can be identified for temperature indices during night-time than during daytime. Moreover, a larger changing magnitude and higher significance of trends of extreme temperature indices can be observed in the eastern Huai River Basin than in the western Huai River Basin. Particularly, we detect an even higher changing rate of extreme temperature indices in the southeastern Huai River Basin. These findings can be well explained by urban heat island effects resulting from urban aggregation across the Yangtze Delta. (4) The correlation between the extreme low temperature indices is slightly higher than that of the extreme high temperature indices. The changing trends of the most extreme temperature indices are closely related to latitude

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Long-term trends in daily temperature extremes over Mongolia

Cited by 66 publications

References 6 publications

Leaf wax <i>n</i>-alkane pattern and compound-specific δ<sup>13</sup>C of plants and topsoils from semi-arid Mongolia

Leaf wax <i>n</i>-alkane pattern and compound-specific δ<sup>13</sup>C of plants and topsoils from semi-arid Mongolia

Spatial and temporal variation in daily temperature indices in summer and winter seasons over India (1969–2012)

Spatiotemporal Patterns of Extreme Temperature across the Huai River Basin, China, during 1961–2014, and Regional Responses to Global Changes

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Long-term trends in daily temperature extremes over Mongolia

Cited by 66 publications

References 6 publications

Leaf wax &lt;i&gt;n&lt;/i&gt;-alkane pattern and compound-specific δ&lt;sup&gt;13&lt;/sup&gt;C of plants and topsoils from semi-arid Mongolia

Leaf wax &lt;i&gt;n&lt;/i&gt;-alkane pattern and compound-specific δ&lt;sup&gt;13&lt;/sup&gt;C of plants and topsoils from semi-arid Mongolia

Spatial and temporal variation in daily temperature indices in summer and winter seasons over India (1969–2012)

Spatiotemporal Patterns of Extreme Temperature across the Huai River Basin, China, during 1961–2014, and Regional Responses to Global Changes

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Leaf wax <i>n</i>-alkane pattern and compound-specific δ<sup>13</sup>C of plants and topsoils from semi-arid Mongolia

Leaf wax <i>n</i>-alkane pattern and compound-specific δ<sup>13</sup>C of plants and topsoils from semi-arid Mongolia