The climate is comprehensive climate One of the indicators, it is the quantity representing the degree of influence of a certain place's climate by the mainland, generally expressed as a percentage (%). The climate continental degree is one of the important signs of the natural characteristics of a place, which is applicable to ocean reach landlocked The vast scope of. There are many methods to calculate the climate continental degree, mainly based on the temperature Annual range (eliminate the influence of latitude) and the latitude anomaly of air temperature. [1] (1) Ivanov comprehensively considers that the annual range of ground temperature is A y , the annual average daily temperature range is A d , the humidity saturation difference of the driest month is D zero And the local latitude is , calculate the climate continental degree of the place according to the following empirical formula. When K>100%, it is continental climate, and the greater the percentage, the stronger the continental climate; When K<100%, it is a marine climate, and the smaller the percentage, the stronger the marine climate (Table 1).
Table 1 Ivanov Continent Grade
Grade | K value/% | type |
one | <47 | Extreme oceanicity |
two | 48~56 | Strong oceanicity |
three | 57~68 | Moderate marine |
four | 69~82 | Oceanicity |
five | 83~100 | Weak oceanicity |
six | 101~121 | Weak continental |
seven | 122~146 | Moderate continental |
eight | 147~177 | Continental |
nine | 178~214 | Strong continental |
ten | >214 | Extreme continental |
(2) Polozova calculates the continental degree according to the season, and calculates the continental degree in January and July respectively by using the latitudinal anomaly of temperature. Polozova uses K one And K seven Continent degrees in January and July respectively. The calculation formula is as follows:
Where Is the temperature anomaly at a certain latitude; Is the maximum positive anomaly value of the month on the latitude circle; Is the maximum negative anomaly value of the month on the weft circle. The above two equations are applicable to the range of 30 ° N~70 ° N. The larger the K value, the higher the continental degree. In addition to temperature range and temperature anomaly, the continental degree also has precipitation and the frequency of continental air masses.
