For most decades, the three month PCI values showed variations in precipitation concentration, with the exception of JFM and JAS during 1990–1999 and 1980–1989. In facing the climate change impact, the country has made solid progress. Differentiation was observed for NDJF during 1990–1999 and for JASO during 2000–2011. Due to the monsoon season, precipitation concentration increased dramatically while that in the winter season decreased. Finally for shorter two-month intervals (MJ, JJ, JA, and AS), most PCI values showed a uniform precipitation distribution. A moderate precipitation distribution was most common in the premonsoon season, although the north–west and south–east areas showed comparatively higher values (>12) than the west, central, and northeast areas (Figure 3(e)). A number of climate change related strategies, plans and actions have been formulated and mitigation measures have been operationalized. Temperature in Bangladesh averaged 24.82 celsius from 1796 until 2015, reaching an all time high of 29.79 celsius in May of 1979 and a record low of 14.79 celsius in January of 1819. First of all, downloaded the Netcdf file of the data and then crack the NC file by using ArcMap software. Subjects admitted to the adult … The PCI on a supraseasonal scale demonstrated a complex precipitation distribution across the study area. Precipitation concentration changes were lower from 2000 to 2011 than in the earlier decades. The decadal analysis (1980–1989, 1990–1999, and 2000–2011) showed that the annual PCI values have varied over time and exhibited irregular distributions. The OND period showed the strongest irregularities in precipitation distribution during 2000–2011 (Figure 6). We advocate for effective and principled humanitarian action by all, for all. The results showed that the rainfall in Bangladesh is moderately seasonal, with an intensity increasing from the premonsoon to the monsoon season, driven by weak tropical depressions from the Bay of Bengal. JFM had moderate and irregular distributions during 1980–1989 and 1990–1999 but irregular and strongly irregular values during 2000–2011 (Figures 6(a)–6(c)). The average amount of annual precipitation … Dhaka has dry periods in January, November and December. Copyright © 2018 Md. A uniform precipitation distribution was observed for the JAS period, although some changes were observed in the south–east region (Figures 6(g)–6(i)). Dhaka, Bangladesh visibility is going to be around 10 km i.e. We defined periods of varying lengths (i.e., annual, supraseasonal, seasonal, and three- and two-month rainfall concentrations) and compared their PCI values. In summer (MAMJ), the PCI values showed a moderate precipitation distribution, with the north–west and south to south–east regions showing a highly moderate distribution (Figures 5(d)–5(f)). Get the monthly weather forecast for Dhaka, Dhaka, Bangladesh, including daily high/low, historical averages, to help you plan ahead. This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2016S1A3A2924243). Find latest updates on global humanitarian responses, Bangladesh Flood Forecasting and Warning Centre, Bangladesh: Floods and Landslides - Apr 2018, NPM Bangladesh Round 17: Thematic Maps (12 May 2020), Joint Response Plan for Rohingya Humanitarian Crisis - Final Report (March-December 2018), Bangladesh: Displacement due to embankment collapse - Emergency Plan of Action Final Report DREF n° MDRBD021. So it is much drier and warmer than in the most parts of the US or Central Europe. Release Date: 2018-05-10. Six-month PCI of JJ for (d) 1980–1989; (e) 1990–1990; (f) 2000–2011. Significant changes in the PCI values between 1980 and 1989 and between 1990 and 1999 were found for the extreme northwestern and southeastern regions. Anarul Haque Mondol, Al-Mamun, Mehedi Iqbal, Dong-Ho Jang, "Precipitation Concentration in Bangladesh over Different Temporal Periods", Advances in Meteorology, vol. According to the analysis of the PCI formulae, on annual, seasonal, and supraseasonal scales, a PCI value of less than 10 indicates perfect uniformity of precipitation distribution (i.e., the same or highly similar amounts of rainfall in each month). The purpose of this study was to analyze precipitation concentration rates in different regions of Bangladesh using the precipitation concentration index (PCI) and the inverse distance weighting method. These 2 years are selected on the basis of full data from all sources: model, satellite and gauge data were available. March, the first month of the spring, in Cox's Bazar, is a tropical month, with average temperature varying between 20.7°C (69.3°F) and 30.9°C (87.6°F).The ideal sea water temperature of 26.5°C (79.7°F) and only 3 rainfall days, with 34.7mm (1.4") of accumulated rainfall, make March the best time for swimming and other water activities. The major objective of this research was to analyze rainfall trend and irregular distribution over the study area at various temporal intervals. It has been suggested that water cycle modification is one of the most notable consequences of global atmospheric warming [6]. The three-month PCI values were highest in the north and south–east and lowest in the central and north–east regions, depending on the annual weather conditions. Anarul Haque Mondol and Al-Mamun designed the research idea, analyzed the data, and wrote the manuscript; Mehedi Iqbal contributed for critical evaluation of the manuscript. This enabled decadal comparisons (1980–1989, 1990–1999, and 2000–2011) between four regions, covering the whole study area. Anarul Haque Mondol et al. The western and central areas showed significant variations and irregular distributions. Bangladesh has a subtropical monsoon climate characterized by wide seasonal variations in rainfall, high temperatures and humidity. Data. Precipitation concentration varies within the country, and the mean annual precipitation varies from a maximum of 5,690 mm in the northeast to a minimum of 1,110 mm in the west [21]. Dhaka, Bangladesh - Monthly weather averages including average high and low Temperature, Precipitation, Pressure, Wind Charts to assist you in planning your travel, holiday or an outdoor activity at Dhaka, Bangladesh The west-central and northeastern regions had similar values, but from 1990 to 1999, the central region changed significantly. Dong-Ho Jang revised the manuscript critically and provided important intellectual content. ABSTRACT Spatial distribution of categorical monsoon rainfall used in Bangladesh Meteorological Department (BMD) over Bangladesh during 1985-2014 using daily rainfall is accomplished in this study. Precipitation and its intensity are important factors on the Bangladesh climate for agricultural production [22]. For the JF period, the south-southeast region showed a more moderate precipitation distribution than the north–west region, while the opposite was observed for the ON period (Figures 4(a) and 4(j)). Precipitation concentration is an important component of climate, and an unbalanced distribution of precipitation can yield excess or scarcity of water resources, which in turn can influence plant growth, flood risk, and water resource use. Several studies in the world indicate that global warming has strong influence on precipitation variation as well as extreme weather events like floods, droughts, and thunderstorms [18, 19, 20]. Three distinct seasons are recognized in Bangladesh: the premonsoon or summer season (MAMJ), the monsoon/rainy season (JASO), and the postmonsoon or winter season (NDJF) [38]. The Climate Research Unit (CRU) data are also used for understanding of the model performance. Comparatively lower values were observed in the south–east, near the Chittagong Hill Tracts (Figure 3(j)), where the distribution was moderate. Owing to the height of this plateau, uplifted moisture condenses, leading to particularly heavy rainfall over northwestern Bangladesh [33]. Bangladesh is one of the world’s most vulnerable countries for climate change. Temperature in Bangladesh decreased to 18.44 celsius in December from 23.08 celsius in November of 2015. In this study, the rainfall data from 30 meteorological observatory stations across Bangladesh were collected for the period 1980 to 2011. Daily Rainfall Data 1007. On average, December is the driest month. For the JD period, lower PCI values (<14) were observed over most of the study area, except for a small region in the south–east near Cox’s Bazar (Figure 3(c)) and were characterized by a moderately irregular precipitation distribution. This is widely recognized by the world community. The groundwater, however, provides adequate storage to compensate for annual variations in rainfall and stream flow. When analyzed on a six months basis, the PCI values of the JJ period for the decades 1980–1989, 1990–1999, and 2000–2011 showed significant irregularities. The annual PCI values were moderate with some irregularities (Figure 2). Meanwhile, SO, ON, ND, and DJ had moderate-to-irregular distributions. The regional differences in the mean PCI using the Kruskal–Wallis test during 1980–1989, 1990–1999, and 2000–2011 in Bangladesh. The IPCC–2007 report found a precipitation increase from 1900 to 2005 north of latitude of 30° [13], and Bangladesh, which is one of the most flood-prone areas of the world, was highlighted as one of the most vulnerable countries [14]. RAINFALL SITUATION UP TO 0900 HOURS ON 06-06-2013 (in millimeter) Location. Bangladesh Rainfall and River Situation Summary as on July 13, 2018 Format News and Press Release Source. These are consistent areas of high altitude where soil conditions and growth capabilities differ from the rest of the country. The PCI values were calculated on an annual scale for each grid point using data from all stations based on the equations of Oliver [27]:where is the total precipitation in month i. During the JJ period, the PCI continued to show moderate-to-high irregularities. Results of analysis of 40,476 cases of Bangladesh occurring during 2000–2017 indicated that 49.73% of the dengue cases occurred during the monsoon season (May–August) and 49.22% during the post-monsoon season (September–December). We will be providing unlimited waivers of publication charges for accepted research articles as well as case reports and case series related to COVID-19. These climate data were interpolated from the respective meteorological stations located in … We collected 46 years (1971-2016) climate data on monthly average temperature and monthly average rainfall from the Bangladesh Meteorological Department, Dhaka. This study analyzed the spatial and temporal precipitation variability using the PCI calculated from dense precipitation datasets collected by the Bangladesh Meteorological Department (BMD). The climate is tropical in Dhaka. RW COVID-19 page: Find latest updates on global humanitarian responses. Decadal analysis of the two-month PCI (a, b, c) JF; (d, e, f) FM; (g, h, i) MA; (j, k, l) AM; (m, n, o) MJ; (p, q, r) JJ; (s, t, u) JA; (v, w, x) AS; (y, z, A) SO; (B, C, D) ON; (E, F, G) ND; (H, I, J) DJ for the representative decades 1980–1989, 1990–1999, and 2000–2011 over Bangladesh. During Winter Season (November–February) a positive trend of PCI values are evident. The average annual rainfall at Bangladesh varies from a maximum of 5,690 mm in the northeast of the country to minimum of 1,110 mm in the west. The decadal analysis revealed a significant differentiation during the decades of 1980–1989 and 1990–1999, while 2000–2011 showed no significant differences (Table 1). The annual trend of PCI has increased by maximum in majority of the stations for most of the periods whereas the SupraSeasonal PCI of July–December has decreased in two third of the stations (Table 2). For the spatial analysis of precipitation, we interpolated data from all weather stations onto a regular grid. A positive trend in annual rainfall and negative trend in winter rainfall (Figures 9 and 10) means that the rainfall of Bangladesh is concentrating in the monsoon and premonsoon months [5]. Based on weather reports collected during 2005–2015. 08 Jul 2018. Decadal analysis of seasonal PCI of NDJF for (a) 1980–1989, (b) 1990–1990, and (c) 2000–2011; MAMJ for (d) 1980–1989, (e) 1990–1990, and (f) 2000–2011; JASO for (g) 1980–1989, (h) 1990–1990, and (i) 2000–2011. Review articles are excluded from this waiver policy. The authors are grateful to Bangladesh Meteorological Department (BMD) for providing the rainfall data. The average temperature in Dhaka is 25.9 °C | 78.6 °F. The base data for this work has been collected from Bangladesh Meteorological Department. The observed rainfall data were available from two sources BMD and BWDB. The decadal analysis showed that the annual PCI values varied over time and exhibited an irregular distribution. The total catchment area of these basins is 1.72 million km², with almost 93% of the catchment area situated outside the territories of Bangladesh – in Bhutan, China, India and Nepal. Bangladesh. The two month PCI values showed that precipitation variation mostly occurred during seasonal transition periods. ... API - Real-time data stream to power next-generation apps. The monsoon season (JASO), when precipitation was generally more uniformly distributed, had lower PCI values (Figures 5(g)–5(i)). These 2 years are selected on the basis of full data from all sources: model, satellite and gauge data were available. Bangladesh has acquired credible capacity in disaster management. The distribution of the annual PCI varied from <14 in the north–east (along Sylhet, Srimangal) to >18 in the north and south–east (Figure 3(a)) near the Bay of Bengal, where a moderate-to-irregular precipitation distribution was observed. This page includes a chart with historical data for Bangladesh Average Precipitation. Curated pages dedicated to humanitarian themes and specific humanitarian crises. Several straightforward indicators can be used to assess variability and analyze hydrological processes [26]. In a year, the rainfall is 2022 mm | 79.6 inch. The country experiences a vast amount of rainfall annually. In this study, precipitation concentration changes at different temporal intervals were compared for the four regions of Bangladesh. However, there are 6 stations Here you can query, map, compare, chart and summarize key climate-related information. 14 Jul 2018 Originally published 14 Jul 2018. The Köppen-Geiger climate classification is Aw. Although many studies in Bangladesh have considered general rainfall and temperature characteristics, few have studied the intensity and distribution of rainfall in this region [22]. 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