Expected changes in future temperature extremes and their elevation dependency over the Yellow River source region

Hu, Yurong; Maskey, Shreedhar; Uhlenbrook, Stefan

doi:10.5194/hess-17-2501-2013

Cited by 17 publications

(9 citation statements)

References 53 publications

(73 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The global average temperature has increased by about 0.13°C per decade since 1950 (IPCC 2007a). Significant warming trends in the Himalayan and Tibetan regions, generally higher than the global average, are reported in the literature (Shrestha et al 1999;Hu et al 2011Hu et al , 2013. Furthermore, the rate of warming is generally larger at the higher elevation (Sharma et al 2009;Hu et al 2013).…”

Section: Introductionsupporting

confidence: 48%

“…Significant warming trends in the Himalayan and Tibetan regions, generally higher than the global average, are reported in the literature (Shrestha et al 1999;Hu et al 2011Hu et al , 2013. Furthermore, the rate of warming is generally larger at the higher elevation (Sharma et al 2009;Hu et al 2013). Such warming trends in the world's largest and highest mountain system will obviously influence the glacier and snow dynamics, leading to changes in water resources availability, particularly during spring and autumn ).…”

Section: Introductionmentioning

confidence: 67%

See 1 more Smart Citation

Climate trends and impacts on crop production in the Koshi River basin of Nepal

et al. 2013

View full text Add to dashboard Cite

Understanding crop responses to climate is essential to cope with anticipated changes in temperature and precipitation. We investigated the climate-crop yield relationship and the impact of historical climate on yields of rice, maize and wheat in the Koshi basin of Nepal. The results show significant impact of growing season temperature and precipitation on crop production in the region. Rice, maize and wheat cultivated at altitudes below 1,100, 1,350 and 1,700 m amsl (above mean sea level), respectively, suffer from stress due to higher temperatures particularly during flowering and yield formation stages. Responses of crop yields to a unitary increment in growing season mean temperature vary from -6 to 16 %, -4 to 11 % and -12 to 3 % for rice, maize and wheat, respectively, depending on the location and elevation in the basin. In most parts of the basin, we observe warming trends in growing season mean temperatures of rice, maize and wheat over the last few decades with clear evidence of negative impacts on yields. However, at some high-elevation areas, positive impacts of warming are also observed on rice and maize yields. If the observed trends in temperature continue in future, the impact is likely to be mostly negative on crop production in the basin. However, crop production may gain from the warming at relatively higher altitudes provided other conditions, e.g., water availability, soil fertility, are favorable.

show abstract

Section: Introductionsupporting

confidence: 48%

Section: Introductionmentioning

confidence: 67%

Climate trends and impacts on crop production in the Koshi River basin of Nepal

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Researchers pointed out that precipitation in the wet season (June-September) is caused by the southwest monsoon from the Bay of Bengal in the Indian Ocean, that is, the Indian Summer Monsoon (Hu, Maskey, & Uhlenbrook, 2013a;Hu, Maskey, Uhlenbrook, & Zhao, 2011;Zheng et al, 2009). However, other researchers pointed out that the climate in the Yellow River source region is strongly governed by the East Asian Summer Monsoon, which brings warm and wet air in the summer (Hu, Maskey, & Uhlenbrook, 2013b;Lan et al, 2010b;Yang, Ding, Chen, Liu, & Lu, 2003). Based on the previous studies, the Yellow River source region is both the maximum northward extent of the Indian Summer Monsoon (Tian et al, 2007;Yao et al, 2009) and the maximum westward extent of the East Asian Summer Monsoon (Araguás-Araguás et al, 1998;Johnson & Ingram, 2004).…”

mentioning

confidence: 99%

Using stable isotopes of surface water and groundwater to quantify moisture sources across the Yellow River source region

Kuang

Luo

Jiao

et al. 2019

Hydrological Processes

View full text Add to dashboard Cite

Characterization of stable isotope compositions (δ2H and δ18O) of surface water and groundwater in a catchment is critical for refining moisture sources and establishing modern isotope–elevation relationships for paleoelevation reconstructions. There is no consensus on the moisture sources of precipitation in the Yellow River source region during summer season. This study presents δ2H and δ18O data from 111 water samples collected from tributaries, mainstream, lakes, and groundwater across the Yellow River source region during summertime. Measured δ18O values of the tributaries range from −13.5‰ to −5.8‰ with an average of −11.0‰. Measured δ18O values of the groundwater samples range from −12.7‰ to −10.5‰ with an average of −11.9‰. The δ18O data of tributary waters display a northward increase of 1.66‰ per degree latitude. The δ18O data and d‐excess values imply that moisture sources of the Yellow River source region during summertime are mainly from the mixing of the Indian Summer Monsoon and the Westerlies, local water recycling, and subcloud evaporation. Analysis of tributary δ18O data from the Yellow River source region and streamwater and precipitation δ18O data from its surrounding areas leads to a best‐fit second‐order polynomial relationship between δ18O and elevation over a 4,600 m elevation range. A δ18O elevation gradient of −1.6‰/km is also established using these data, and the gradient is in consistence with the δ18O elevation gradient of north and eastern plateau. Such relationships can be used for paleoelevation reconstructions in the Yellow River source region.

show abstract

“…One of the major climatic factor responsible for agricultural production is temperature (both maximum and minimum). According to IPCC 2007 the global average temperature has gone up by about 0.13 0 C per decade since 1950 .The study suggests that warming trends in the Himalayan region and nearby is significant, generally higher compared to global average (Shrestha et al 1999;Hu et al2011Hu et al , 2013. The study also suggests that the rate of warming is most often increases with increased elevation (Sharma et al 2009;Hu et al2013).…”

Section: Introductionmentioning

confidence: 98%

Correlation of climatic factors with cereal crops yield: a study from historical data of Morang district, Nepal

Khanal¹

2015

J. Agric. & Environ.

View full text Add to dashboard Cite

The present study is based on the secondary sources of inforamation on temperature, rainfall and productivity of four major cereals ( Rice, Maize, Finger Millet and Wheat) in Morang district of Nepal. A total of 17 years data (1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011) on yield of crops, annual total rainfall, annual mean maximum temperature and annual mean minimum temperature is analysed. The suitability analysis of crops shows that all the four cereals found to be suitable for cultivation in temperature range of Morang district, whereas irrgigation is required in addition to recorded rainfall in case of rice and wheat. The production of three cereals except millet (which is almost stable) has increased during the study period. The analysis of correlation coefficient shows that maize yield and minimum temperature have strong positive correlation (0.7755). The linear regression analysis showed that the yield of maize was significant and highly sensitive to combined effect of all three climatic factors (R 2 0.7414). Whereas, the yield of rice, millet and wheat were not statistically significantly related. At individul climatic factors level, yield of maize and wheat were significantly related with annual mean minimum temperature. The yield of these crops can be increased by crop managementmainly by altering the planting time, varieties and irrigation practices.

show abstract

Expected changes in future temperature extremes and their elevation dependency over the Yellow River source region

Cited by 17 publications

References 53 publications

Climate trends and impacts on crop production in the Koshi River basin of Nepal

Climate trends and impacts on crop production in the Koshi River basin of Nepal

Using stable isotopes of surface water and groundwater to quantify moisture sources across the Yellow River source region

Correlation of climatic factors with cereal crops yield: a study from historical data of Morang district, Nepal

Contact Info

Product

Resources

About