Drought levels in the cropland in Belt and Road area from 2001 to 2013

Dataset content features

Abstract

Based on the Tropical Rainfall Measurement Satellite (TRMM) 3B43 precipitation data, we used the Precipitation Abnormity Percentage drought model to study the monthly spatio-temporal distribution of drought in south region of N50° of OBOR area from 2001 to 2013. Yearly spatio-temporal distribution from 2001 to 2013 of cropland in OBOR area was extracted based on the MODIS MCD12Q1 dataset and there were 156 monthly drought levels in the cropland region according to the overlaying of drought and agricultural land layers. The data are in TIFF format with a spatial resolution of 500 m.

Elements (content fields)

The datasets were named as “croplandYYYYMM”, in which “YYYY” means the year and “MM” means the month. The datasets were calculated and classified based on the Precipitation Abnormity Percentage drought index, and there were 5 classifications including extremely dry, severely dry, moderately dry, mildly dry, and no drought, corresponding to 5, 4, 3, 2, 1, respectively. The datasets value were non-dimensional.

Temporal cover

Time of the dataset ranged from Jan.2001 to Dec.2013.

Spatial cover

The research area ranges from 10°55′48″S to 50°00′00″N and 12°23′53″E to 155°24′17″E, contains 61 countries and regions: Mongolia, Russia, China, Singapore, Indonesia, Thailand, Vietnam, Philippines, Cambodia, Myanmar, Laos, Brunei, East Timor, India, Pakistan, Sri Lanka, Bangladesh, Nepal, Maldives, Bhutan, United Arab Emirates, Kuwait, Turkey, Qatar, Oman, Lebanon, Saudi Arabia, Bahrain, Israel, Yemen, Egypt, Iran, Jordan, Syrian, Iraq, Afghanistan, Palestine, Azerbaijan, Georgia, Armenia, Poland, Albania, Slovenia, Bulgaria, Czech Republic, Hungary, Macedonia, Serbia, Romania, Slovakia, Croatia, Bosnia and Herzegovina, Montenegro, Ukraine, Moldova, Kazakhstan, Kyrgyzstan, Turkmenistan, Tajikistan, Uzbekistan.

Subject/industry scope of dataset/atlas

Subject scope

Earth Science, Meteorology, Remote Sensing, Agriculture.

Industry scope Meteorological services, agricultural production and environmental monitoring.

Accuracy of dataset/atlas

Time frequency

Monthly.

Spatial reference, accuracy, and granularity

The spatial reference of the dataset was GCS_WGS_1984, with a spatial resolution of 500 m, the minimal granularity of the dataset was a country.

Dataset/atlas storage management

Data quantity

The volume of the dataset was 2.12 GB.

Type format

The dataset was stored in hard disk with a format of TIFF.

Update management

Unscheduled update.

Quality control of the dataset/atlas**

Production mode

Raw data of the dataset is TRMM 3B43 satellite precipitation data and MODIS MCD12Q1 landcover data product, the distribution of drought in Belt and Road area was calculated in ArcGIS, Matlab and R software based on the Precipitation Abnormity Percentage drought model, and the distribution of cropland in Belt and Road area was extracted in MCD12Q1 dataset.

Data sources (condition selection)

TRMM 3B43 satellite precipitation data; MODIS MCD12Q1 landcover data product.

Methods of the data acquisition and processing (condition selection)

The primary TRMM images was a vertical stripe in ENVI software without spatial reference. Then the data was corrected in Matlab according to the data documentation. Firstly, upside down the image after 90 degrees counterclockwise rotation around the center. Then we figured out the longitude and latitude of the center point of the first grid of upper left corner and the last grid of bottom right corner of image were 179.875°W, 49.875°N, 179.875°E, 49.875°S, respectively. Next, the real longitude and latitude of grid were assigned by the georasterref method to correcting images and output in TIFF format, Fig.1 showed the correction results. Finally, the data value were summarized to monthly precipitation from hour scale.

The spatio-temporal distribution of drought in the study area was calculated using the Precipitation Abnormity Percentage drought model. The Precipitation Abnormity Percentage（Pa）is one indicator used to measure variations of precipitation compared to the normal value in a certain period. It is suitable for periods where the average temperature is above 10 ℃ in semi-humid, semi-arid areas. Table below shows the categories of drought levels based on the Precipitation Abnormity Percentage. In this paper, descriptions, such as extremely dry, severely dry, moderately dry, mildly dry, and no drought, are based on the standards given in this drought classification table of Precipitation Abnormity Percentage.

Sharing and usage method of the dataset/atlas

Sharing methods and restrictions

Full and open sharing.

Contact information of the sharing service (condition selection)

Online link address: http://drr.ikcest.org/info/90617.

Contact Information for Service：

Name: Bai Yongqing

Address：11A, Datun Road, Chaoyang District, Beijing, 100101, China, Institute of Geographic Sciences and Natural Resources Research, CAS.

Zip Code：100101

E-mail:baiyq@lreis.ac.cn

Conditions and methods of usage

The dataset can be read by ArcGIS software.

Intellectual property rights of the dataset/atlas

Property rights (optional)

Intellectual property of the dataset belonged to Institute of Geographic Sciences and Natural Resources Research, CAS.

Reference method of the dataset/atlas

Bai Yongqing, Wang Juanle. Time and space distribution of monthly drought dataset in One Belt One Road area (1998-2015)[DB/OL]. Science Data Bank. DOI: 10.11922/sciencedb.381.

Usage contacts of the datasets/atlas Name: Bai Yongqing

Address：11A, Datun Road, Chaoyang District, Beijing, 100101, China, Institute of Geographic Sciences and Natural Resources Research, CAS.

Zip Code：100101

E-mail:baiyq@lreis.ac.cn

Others (optional)

In addition to the above, other information must also be explained.

Data documentation author：Bai Yongqing

Update time：2017-8-28 Organization：Institute of Geographic Sciences and Natural Resources Research, CAS

Contact information：Email Address：11A, Datun Road, Chaoyang District, Beijing, 100101, China Postcode 100101

Telephone：13051580902

E-mail: baiyq@lreis.ac.cn