请问ERA数据中的水汽通量散度

shuuichi

Vertical integral of divergence of moisture flux
Vertically integrated moisture divergence
这是ERA5提供的单层数据，其中第一个Vertical integral of divergence of moisture flux是垂直累积水汽通量散度，请问这个是地面到300hPa的吗？
第二个，是垂直累积水汽散度么？这个量是怎么计算的？
谢谢！！！！

xuanyuanyiyir

同问啊

清木77

官网的解释Vertical integral of divergence of moisture flux(kg m-2 s-1)：The vertical integral of the moisture flux is the horizontal rate of flow of moisture, per metre across the flow, for a column of air extending from the surface of the Earth to the top of the atmosphere. Its horizontal divergence is the rate of moisture spreading outward from a point, per square metre. This parameter is positive for moisture that is spreading out, or diverging, and negative for the opposite, for moisture that is concentrating, or converging (convergence). This parameter thus indicates whether atmospheric motions act to decrease (for divergence) or increase (for convergence) the vertical integral of moisture. 1 kg of water spread over 1 square metre of surface is 1 mm deep (neglecting the effects of temperature on the density of water), therefore the units are equivalent to mm (of liquid water) per second.

lil.yuyu

同问，想打开看看数据，请问可以用什么打开.nc的数据文件？

wyy713

lil.yuyu 发表于 2022-7-29 12:51
同问，想打开看看数据，请问可以用什么打开.nc的数据文件？

可以用python中的xarray库包查看nc文件