Climate of Dhaka: Difference between revisions

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*In October 2010, [[Cyclone Giri]] caused heavy rainfall in the extreme eastern parts of the country.
*In October 2010, [[Cyclone Giri]] caused heavy rainfall in the extreme eastern parts of the country.


==Monsoon rainfall of Dhaka==
The [[Monsoon]] season begins from June till September. The following is the annual monsoon rainfall for the last few years based on data from the Bangladesh Meteorological Department.<ref>http://www.bmd.gov.bd/Monsoon_rain/Dhk_mon_rain.html</ref>

*In 2000, a total of {{convert|5220|mm|in}} was recorded.
*In 2001, a total of {{convert|5590|mm|in}}was recorded.
*In 2002, a total of {{convert|7257|mm|in}} was recorded.
*In 2003, a total of {{convert|4934|mm|in}} was recorded.
*In 2004, a total of {{convert|8308|mm|in}} was recorded.
*In 2005, a total of {{convert|6903|mm|in}} was recorded.
*In 2006, a total of {{convert|7137|mm|in}} was recorded.
*In 2007, a total of {{convert|8895|mm|in}} was recorded.
*In 2008, a total of {{convert|6712|mm|in}} was recorded.
*In 2009, a total of {{convert|6252|mm|in}} was recorded.
*In 2010, a total of {{convert|5016|mm|in}} was recorded.
==References==
==References==
{{Reflist}}
{{Reflist}}

Revision as of 14:01, 19 November 2010

Dhaka experiences a hot, wet and humid tropical climate. Under the Koppen climate classification, Dhaka has a tropical wet and dry climate. The city has a distinct monsoonal season, with an annual average temperature of 25 °C (77 °F) and monthly means varying between 18 °C (64 °F) in January and 29 °C (84 °F) in August.[1] Nearly 80% of the annual average rainfall of 1,854 millimeters (73 in) occurs between May and September.[1] Increasing air and water pollution emanating from traffic congestion and industrial waste are serious problems affecting public health and the quality of life in the city.[2] Water bodies and wetlands around Dhaka are facing destruction as these are being filled up to construct multi-storied buildings and other real estate developments. Coupled with pollution, such erosion of natural habitats threatens to destroy much of the regional biodiversity.[2]

Climate data for Dhaka
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) 24
(76) 		27
(80) 		31
(87) 		32
(89) 		33
(91) 		31
(88) 		32
(90) 		31
(88) 		31
(87) 		31
(87) 		28
(83) 		25
(77) 		29
(85)
Mean daily minimum °C (°F) 14
(58) 		17
(63) 		22
(72) 		25
(77) 		26
(79) 		27
(81) 		27
(81) 		27
(81) 		27
(80) 		25
(77) 		21
(69) 		16
(61) 		23
(73)
Average precipitation mm (inches) 7.6
(0.3) 		20
(0.8) 		58
(2.3) 		120
(4.6) 		270
(10.5) 		360
(14.1) 		400
(15.7) 		320
(12.5) 		260
(10.1) 		160
(6.4) 		30
(1.2) 		5.1
(0.2) 		1,980
(77.9)
Source: weatherbase.com [1]

Impact of Climate change

Climate change has forced many people of Bangladesh livinng in rural areas to migrate to cities that has caused a sharp rise in the slum population of Dhaka.[3] As Bangladesh is already less than 20 feet above sea level, thus there are fears that by the end of the 21st century, more than a quarter of the country will be inundated and 15 million people will be displaced.[4] Dhaka which has a population of 13 million people, its population is projected to increase to 20 million by the year 2025 raising the fears of water-borne diseases and outbreak of several other diseases.[5] While a UN and WWF report warned that Dhaka tops the risk of climate change in Asia.[6]

List of cyclones that affected Dhaka and Bangladesh coast during the 21st century

Wettest tropical cyclones and their remnants in Bangladesh
Highest-known totals
Precipitation Storm Location Ref.
Rank mm in
1 1,051.2 41.39 Komen 2015 Chittagong [7]
2 ~300 ~12.00 Rashmi 2008 [8]
3 280 11.02 Monsoon Depression — Sep. 2004 Barisal [9]
4 253 10.00 Viyaru 2013 Patuakhali [10]
5 227.2 8.94 Trop. Depression — Oct. 2004 Rangpur [11]
6 220.0 8.66 Bhola 1970 Maya Bandar [12]
7 200 7.87 Sidr 2007 [13]
8 130 5.11 Aila 2009 Chittagong [14]
9 129 5.07 Bijli 2009 [15]
10 53 2.13 Akash 2007 [16]
Main article: List of Bangladesh tropical cyclones

Bangladesh witness cyclones almost every year though there intensity varies from year to year. The 1970 Bhola cyclone is the most deadly cyclone in its history. Following are the cyclones of 21st century in Bangladesh.

  • In November 2002, Cyclone BOB 01 hit Bangladesh as a weak tropical depression.
  • In November 2007, Cyclone Sidr makes landfall on southern Bangladesh, causing over 2,000 deaths and severe damage.[17]
  • In April 2009, Cyclone Bijli caused heavy rainfall along the bangladesh coast.
  • In October 2010, Cyclone Giri caused heavy rainfall in the extreme eastern parts of the country.

Monsoon rainfall of Dhaka

The Monsoon season begins from June till September. The following is the annual monsoon rainfall for the last few years based on data from the Bangladesh Meteorological Department.[18]

  • In 2000, a total of 5,220 millimetres (206 in) was recorded.
  • In 2001, a total of 5,590 millimetres (220 in)was recorded.
  • In 2002, a total of 7,257 millimetres (285.7 in) was recorded.
  • In 2003, a total of 4,934 millimetres (194.3 in) was recorded.
  • In 2004, a total of 8,308 millimetres (327.1 in) was recorded.
  • In 2005, a total of 6,903 millimetres (271.8 in) was recorded.
  • In 2006, a total of 7,137 millimetres (281.0 in) was recorded.
  • In 2007, a total of 8,895 millimetres (350.2 in) was recorded.
  • In 2008, a total of 6,712 millimetres (264.3 in) was recorded.
  • In 2009, a total of 6,252 millimetres (246.1 in) was recorded.
  • In 2010, a total of 5,016 millimetres (197.5 in) was recorded.

References

  1. ^ a b c "Weatherbase: Historical Weather for Dhaka, Bangladesh". weatherbase.com. Retrieved 2008-12-15.
  2. ^ a b Mondal, M. Abdul Latif (2006-09-27). "Our Cities: 15th Anniversary Special". The Daily Star. Retrieved 2006-09-27.
  3. ^ http://www.citiesalliance.org/ca/node/420
  4. ^ http://www.citiesalliance.org/ca/node/420
  5. ^ http://www.preventionweb.net/english/professional/publications/v.php?id=4292
  6. ^ http://www.reuters.com/article/idUSSP480964
  7. ^ Nick Wiltgen (July 31, 2015). "Tropical Cyclone Komen Soaking Waterlogged Bangladesh, Myanmar; At Least 33 Reported Dead, 6 Missing". The Weather Channel. Retrieved July 31, 2015.
  8. ^ "Bangladesh: Tropical Cyclone Rashmi" (PDF). World Food Program. United Nations. 2008. Archived from the original (PDF) on April 11, 2013. Retrieved March 30, 2010.
  9. ^ Padgett, Gary; Kevin Boyle; John Wallace; Huang Chunliang; Simon Clarke (2005-05-17). "Monthly Global Tropical Cyclone Summary September 2004". Australian Severe Weather Index. Jimmy Deguara. Retrieved 2007-01-13.
  10. ^ "Crops on 1.28 lakh hectares land damaged". The Daily Star. May 18, 2013. Retrieved May 18, 2013.
  11. ^ Padgett, Gary; Kevin Boyle; John Wallace; Huang Chunliang; Simon Clarke (2005-05-17). "Monthly Global Tropical Cyclone Summary October 2004". Retrieved 2007-01-13.
  12. ^ 1970 Annual Summary Part C — Storms & Depressions (PDF) (India Weather Review). India Meteorological Department. p. 10. Archived (PDF) from the original on 2012-06-01. Retrieved 2012-06-01.
  13. ^ "Cyclone Sidr Rainfall Total". NASA. 2007. Retrieved June 15, 2009.
  14. ^ Staff Writer (2009). "Cyclone Aila Preliminary Report" (PDF). India Meteorological Department. Retrieved June 15, 2009.
  15. ^ Hal Pierce and Rob Gutro (April 20, 2009). "Hurricane Season 2009: Bijli (Northern Indian Ocean)". NASA. Retrieved May 23, 2009.
  16. ^ International Federation of Red Cross And Red Crescent Societies (2007). "Bangladesh: Cyclonic Storm Information Bulletin No. 01/2007". Retrieved 2007-05-17.
  17. ^ "Cyclone death toll mounts to 2388 in Bangladesh (2nd Roundup)". Monsters & Critics. 2007-11-17. Retrieved 2007-11-17.
  18. ^ http://www.bmd.gov.bd/Monsoon_rain/Dhk_mon_rain.html
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