The Implications of Climate Change for Bangladesh: A Synthesis

Ahmad, Qazi Kholiquzzaman; Warrick, R. A.; Ericksen, Neil J.; Mirza, M. Q.

doi:10.1007/978-94-009-0241-1_1

Cited by 17 publications

(17 citation statements)

References 2 publications

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“…Research has shown that the trend and magnitude of global warming over India/Indian sub-continent over the last century is broadly consistent with the global trend and magnitude (Hingane, 1995;Kumar, 1997, Arora et al, 2005). Studies in the neighbouring country (Bangladesh) have also shown warming trends (ADB, 1994;Ahmad and Warrick, 1996). It is reported that over the past 100 years, the broad region encompassing Bangladesh has warmed by 0Ð5°C (Ahmad and Warrick, 1996).…”

Section: Rainfall and Relative Humidity Variations In Different Rivermentioning

confidence: 98%

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Changes in rainfall and relative humidity in river basins in northwest and central India

Singh¹,

Kumar

Thomas³

et al. 2007

Hydrological Processes

131

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Abstract:Seasonal and annual trends of changes in rainfall, rainy days, heaviest rain and relative humidity have been studied over the last century for nine different river basins in northwest and central India. The majority of river basins have shown increasing trends both in annual rainfall and relative humidity. The magnitude of increased rainfall for considered river basins varied from 2-19% of mean per 100 years. The maximum increase in rainfall is observed in the Indus (lower) followed by the Tapi river basin. Seasonal analysis shows maximum increase in rainfall in the post-monsoon season followed by the pre-monsoon season. There were least variations in the monsoon rainfall during the last century and winter rainfall has shown a decreasing trend. Most of the river basins have experienced decreasing trends in annual rainy days with a maximum decrease in the Mahanadi basin. The heaviest rain of the year has increased from 9-27 mm per 100 years over different river basins with a maximum of 27 mm for the Brahamani and Subaranrekha river basins. A combination of increase in heaviest rainfall and reduction in the number of rainy days suggest the possibility of increasing severity of floods. Such information is useful in the planning, development and management of water resources in the study area. Further, the majority of river basins have also experienced an increasing trend in relative humidity both on seasonal and annual scales. An increase in annual mean relative humidity for six river basins has been found in the range of 1-18% of mean per 100 years, while a decrease for three river basins from 1 to 13% of mean per 100 years was observed, providing a net increase in the study area by 2Ð4% of mean per 100 years. It is understood that an increase in areal extent of vegetation cover as well as rainfall over the last century has increased the moisture in the atmosphere through enhanced evapotranspiration, which in turn has increased the relative humidity.

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Section: Rainfall and Relative Humidity Variations In Different Rivermentioning

confidence: 98%

“…Studies in the neighbouring country (Bangladesh) have also shown warming trends (ADB, 1994;Ahmad and Warrick, 1996). It is reported that over the past 100 years, the broad region encompassing Bangladesh has warmed by 0Ð5°C (Ahmad and Warrick, 1996).…”

Section: Rainfall and Relative Humidity Variations In Different Rivermentioning

confidence: 98%

Changes in rainfall and relative humidity in river basins in northwest and central India

Singh¹,

Kumar

Thomas³

et al. 2007

Hydrological Processes

131

View full text Add to dashboard Cite

show abstract

“…These warming rates are much higher than the values reported for the country as a whole. Studies in the neighbouring country, Bangladesh, have also shown warming trends (Ahmad & Warrick, 1996;ADB, 1994). It is reported that, over the past 100 years, the broad region encompassing Bangladesh has warmed by 0.5ºC (Ahmad & Warrick, 1996).…”

Section: Signatures Of Warmer Climate Over Indiamentioning

confidence: 99%

Basin-wide assessment of temperature trends in northwest and central India / Estimation par bassin versant de tendances de température au nord-ouest et au centre de l'Inde

Singh¹,

Kumar

Thomas

et al. 2008

Hydrological Sciences Journal

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“…Several studies have reported that warming has taken place over India (Arora et al 2005, Singh et al 2008), Bangladesh (Ahmad & Warrick 1996), and Nepal (Shrestha et al 1999). Shrestha et al (1999) reported increases of 0.61, 0.90, and 1.24°C decade -1 in winter maximum temperatures for Nepal, Himalayan, and trans-Himalayan climate stations, respectively.…”

Section: Introductionmentioning

confidence: 97%

Hydro-meteorological trends in the upper Indus River basin in Pakistan

Khattak¹,

Babel²,

Sharif³

2011

Clim. Res.

225

165

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We examined trends in several hydro-meteorological variables in the upper Indus River basin (UIRB) in Pakistan. To represent the diversity of hydro-meteorological conditions in the basin, mean monthly data from 20 meteorological and 8 hydrometric stations were analyzed for detection of trends using the non-parametric Mann-Kendall test in combination with the trend-free pre-whitening approach for correcting time series data sets for serial correlation. Sen's slope method, a non-parametric alternative for estimating a slope for a univariate time series, was used to determine the magnitude of trends. The meteorological variables we considered were: minimum temperature, maximum temperature, and precipitation, whereas the hydrological variable considered was streamflow. For several of the variables, many more trends were identified than can be expected to occur by chance. Analysis of winter maximum temperature revealed an increasing trend with the trend in slopes of 1.79, 1.66, and 1.20°C per 39 yr for the upper, middle, and lower regions, respectively. Precipitation trends were inconsistent and showed no definite pattern. Trends in streamflow were found to be related to increasing trends in mean maximum temperature, particularly in winter and spring seasons. Increased winter temperatures are likely to increase streamflow in winter and spring. During summer months streamflow will decrease and reduce the availability of water in the Tarbela Dam, thereby requiring changes in the reservoir operating policy towards more efficient management of available water. KEY WORDS: Climate change · Trend analysis · Pakistan · Mann-Kendall test · Sen's slope test · Upper Indus River basinResale or republication not permitted without written consent of the publisher Clim Res 46: 103-119, 2011 Many precipitation trend studies have also been carried out in the South Asia region (e.g. Zhang et al. 2005, Huang et al. 2009). Gemmer et al. (2003 showed that there was an increasing precipitation trend in southwestern Xinjiang, which is an area adjacent to the northern part of Pakistan, and in Jammu-Kashmir, which is southwest of Tibet. Archer & Fowler (2004) used linear regression to analyze precipitation data from various stations in the upper part of the Indus River basin with different record lengths. A significant increasing trend of precipitation in winter and summer during the period 1961-1999 was detected. On the contrary, Raziei et al. (2005) concluded that precipitation in Iran is decreasing. Kezer & Matsuyama (2006) investigated runoff trends for the Ili and East Rivers in Central Asia; no statistically significant change was observed except for runoff. Chen et al. (2007Chen et al. ( ) investigated temporal (1951Chen et al. ( -2003 trends in annual and seasonal precipitation, temperature, and runoff in the Hanjiang basin in China using the Mann-Kendall test and linear regression. Results indicated that precipitation did not exhibit a significant trend, but a significant increasing trend for temperature was seen in mo...

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The Implications of Climate Change for Bangladesh: A Synthesis

Cited by 17 publications

References 2 publications

Changes in rainfall and relative humidity in river basins in northwest and central India

Changes in rainfall and relative humidity in river basins in northwest and central India

Basin-wide assessment of temperature trends in northwest and central India / Estimation par bassin versant de tendances de température au nord-ouest et au centre de l'Inde

Hydro-meteorological trends in the upper Indus River basin in Pakistan

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