melting arctic sea ice Due to climate change, it is predicted that the Arctic will receive more rain than snow earlier.
The Arctic has been chosen as the place where the temperature is rising the fastest due to global warming, with an ice-free summer sea imminent, and it is predicted that there will be more rain than snow within this century.
A research team led by Dr Mitchell McCrystal of the University of Manitoba’s Center for Earth Observational Sciences in Canada has found that the time when rain becomes common in the Arctic is decades earlier than previously thought, and could have a variety of social and economic impacts as well as climate and ecosystems. The results were published in the scientific journal Nature Communications.
The research team evaluated the change in precipitation up to 2100 using the latest forecast of the ‘6th Junction Belt Circulation Model Comparison Project’ (CMIP6) and compared it with the CMIP5 result.
CMIP6 suggests that Arctic waters warming and sea ice loss is accelerating faster than CMIP5 predicted, resulting in higher and faster Arctic precipitation and a transitional period with more rain than snow in summer and autumn. predicted to arrive earlier.
The research team predicted that precipitation such as snow and rain in the Arctic region will increase throughout the four seasons.
As the sea ice decreases, the amount of evaporation increases as seawater is exposed to sunlight, and the capacity to hold moisture increases as the air temperature rises, leading to more precipitation.
It is also predicted that the proportion of rain in the total precipitation will be greater than snow 10 to 20 years earlier than previously predicted by other models.
Although there are differences according to regions and seasons, it has been predicted that rain will be greater than snow in the 2090s in the central Arctic region, but this study predicted that the period would be 2060-2070.
The team also suggested that more rain than snow could occur with a smaller temperature rise, suggesting that in areas like Greenland, an increase of just 1.5 degrees Celsius would cause this change.
Studies have shown that heavy rain instead of snow in the Arctic can affect the mass, sea level, river flow, size and thickness of sea ice, and permafrost on the Greenland continent.
The research team emphasized the need for more stringent policies to mitigate climate change, given that rain in the Arctic can have a social, ecological, economic, and cultural impact if it becomes commonplace.
[연합뉴스]
Copyrights ⓒ Yonhap News. Unauthorized reproduction and redistribution prohibited
