The online map of average annual frost-free days in China from 1981 to 2010 comes from China Severe Weather and Climate Atlas (1961-2015). This atlas is compiled by the National Climate Center and published by the meteorological publishing house.
This atlas is compiled based on the statistics of national meteorological observation data, including 16 kinds of disastrous weather and climate graphic analysis products affecting China, including typhoon, rain and waterlogging, snow disaster, cold wave, gale, sandstorm, low temperature and cold damage, high temperature, drought, lightning, hail, frost, freezing, fog, haze and acid rain, such as the spatial distribution map of annual and seasonal occurrence frequency, the spatial distribution map of certain characteristic values, the national and regional frequency of the changes over the years (1961-2015), the national and regional frequency of the monthly changes, etc., a total of more than 300 Width.
In addition, the disaster information change maps of major meteorological disasters such as typhoon, rain and waterlogging, low-temperature freezing damage and snow disaster, drought, lightning and hail are compiled, and individual cases of major historical disaster events such as typhoon, rain and waterlogging, sandstorm, low-temperature freezing damage and snow disaster, high temperature and drought are selected. In order to facilitate readers' reading and comprehension, this atlas not only provides a large number of intuitive graphics, but also provides text descriptions of the main features.
This atlas is a reference book for understanding China's disastrous weather and climate. It can be used by business, scientific research, teaching and other personnel in the fields of meteorology, agriculture, water conservancy, geography, education, environment, land and resources, as well as by relevant departments such as disaster prevention and reduction, construction planning and so on.
Frost is a kind of agrometeorological disaster caused by the temperature of soil surface and plants falling to 0 ℃ or below 0 ℃ during the growing season. When frost occurs, there can be frost (white frozen matter, also known as white frost) or no frost. Initial frost refers to the frost that first appears during the transition from warm season to cold season; Final frost refers to the last frost during the transition from cold season to warm season; Frost free period refers to the number of days from the next day of the final frost to the day before the first frost.
The basic characteristic of the distribution of annual frost free days in China is that it decreases gradually from south to north. South China, most of Sichuan Basin and southern Yunnan are the most, more than 300 days; 250-300 days in most parts of Jiangnan, Jianghan, northern Sichuan Basin, Guizhou and Northern Yunnan; 200-250 days in southeastern North China, Huanghuai, Jianghuai, Southern Anhui, southern Shaanxi and Western Southern Xinjiang; 100-200 days for most of the northeast, northwest, Inner Mongolia, Shanxi, northern Hebei and Southeast Tibet; Most of the Qinghai Tibet Plateau, northwest of Heilongjiang and northeast of Inner Mongolia are less than 100 days.
Online map of average first frost occurrence date from 1981 to 2010
Online map of the average occurrence date of final frost in China from 1981 to 2010
Online map of the earliest occurrence date of early frost in China from 1961 to 2015
Online map of the latest occurrence date of China's final frost from 1961 to 2015
Online map of early occurrence frequency of early frost in China from 1981 to 2010
Online map of occurrence frequency of late frost in China from 1981 to 2010
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