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This page introduce our meteorological observation network.
This page introduce our meteorological observation network.
Our study area is located on the southern slope of the Meghalaya plateau with an altitude of 2,000 meters. This study area separates the Brahmaputra valley from the Himalayas. Meghalaya is a relatively recently established state. Its name is originated from the Sanskrit word as "the abode of rains", as opposed to the Himalayas, "the abode of snow". There are very deep gorges around Cherrapunji, which favors predominant topographic precipitation.
This map shows the observation points in our research group. The circles and squares indicate the locations where rain gauges observation and sonde observations, respectively. The difference in colors indicates the difference in regions: pink, white, green and yellow mean Assam, Meghalaya, Sylhet, and other regions of Bangladesh, respectively.
Figure: Observed precipitation extremes at various time scales (from Kiguchi and Oki, 2010).
This figure shows the world record of precipitation on the time scale from 1 minute to 2 years on the horizontal axis. The black text indicates the Japanese record. Japan has the world record amount of daily rainfall. Cherrapunji's record is on a longer time scale than a month.
At present, the number of observation points is 42 (+α), and observations have been conducted continuously from 2006 to the present. The number of observation points has not been changed during this period. However, since 2015, we have been experimentally conducting rain gauge observations at Meghalaya. In Bangladesh, the instrumentation was changed to that made in Japan, and in India, the instrumentation was changed to that made in India until 2013, and then to that made in Japan from 2014.
The observational data have been quality-checked, and a database has been created for the period 2006-March 2012. The data will be made available to our collaborators and counterparts, as well as to researchers who have requested it. Use of the data is subject to acceptance and submission of the Terms and Conditions here.
Note: We have not been able to collect data from Bangladesh since March 2015.
Bangladesh
Bangladesh
Raingauges Network
Dhaka
Sylhet：12 points
Automatic Weather Stations
Jahangirnagar University, Dhaka, Bangladesh
Period: 2023.8.27~current
Observation factors: Temperature, Humidity, Pressure, Wind speed, Wind direction, Precipitation, Downward Short-wave Radiation, Downward Long-wave Radiation
IIT Guwahati, Guwahati, India
2023.9.7~current
Observation factors: Temperature, Humidity, Pressure, Wind speed, Wind direction, Precipitation, Downward Short-wave Radiation, Downward Long-wave Radiation
Sylhet Airport, Sylhet, Bangladesh
Period: 2023.8.30~current
Observation factors: Downward Short-wave Radiation, Downward Long-wave Radiation
BARI Jaintiapur, Sylhet, Bangladesh
Period: xxx~current
Observation factors: Temperature, Humidity, Pressure, Wind speed, Wind direction, Precipitation, Downward Short-wave Radiation, Downward Long-wave Radiation
(Planned: Dhaka, Matlab, Chakoria / with ICDDRB)
Disdrometer
Sylhet BMD, Sylhet, Bangladesh
Period: xxx~xxx
Observation factors: xxx
BMD, Dhaka, Bangladesh
Period: xxx~xxx
Observation factors: xxx
Ship radar
Dhaka University, Dhaka, Bangladesh
Period: (Setup)
India
India
Raingauges Network
Assam: 15 points
Meghalaya: 10 points
Automatic Weather Stations
Cherrapunji, Meghalaya, India
Period: XXXX~current
Observation factors: Temperature, Humidity, Pressure, Wind speed, Wind direction, Precipitation, Downward Short-wave Radiation, Downward Long-wave Radiation
Disdrometer
NEHU, Meghalaya, India
Period: xxx~xxx
Observation factors: xxx
IMD Cherrapunji, Meghalaya, India
Period: xxx~xxx
Observation factors: xxx
Mawsynram Border Area College, Meghalaya, India
Period: xxx~xxx
Observation factors: xxx
Upper Layer Observations Campaigns
Upper Layer Observations Campaigns
Terao (KAKEN-B) Observations Campaigns
Date: 11 September, 2023 (00, 06, 12, 18 UTC)
Sites:
Dhaka BMD campus
Sylhet BMD campus
Guwahati IMD campus.
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