ERA5 LAND的月平均Surface sensible heat flux如何换算成W m-2

老A

请教各位大侠，如题，ERA5 LAND的月平均Surface sensible heat flux 单位是J/M2,请问如何换算成W m-2?如官网所说的To convert to watts per square metre (W m-2), the accumulated values should be divided by the accumulation period expressed in seconds. （要转换为瓦特每平方米 (W m-2)，应将累积值除以以秒表示的累积周期。 )月平均Surface sensible heat flux是不是要除以（3600s*24小时*该月的日数）换算成瓦特每平方米 (W m-2)?还是只除以（3600s*24小时）？请教各位大侠。

付亚男

This parameter is accumulated over a particular time period which depends on the data extracted. For the monthly averaged reanalysis and the monthly averaged ensemble members, the accumulation period is 1 day. For the monthly averaged reanalysis by hour of day, the accumulation period is 1 hour and for the monthly averaged ensemble members by hour of day, the accumulation period is 3 hours.

下载数据的时候，在 Product type 中可以选择上面4类中的哪一类:
如果是monthly averaged reanalysis或者monthly averaged ensemble members，那么就除以(3600*24)；
如果是monthly averaged reanalysis by hour of day，那么就除以3600；
如果是monthly averaged ensemble members by hour of day，那么就除以3600*3。

付亚男

This parameter is accumulated over a particular time period which depends on the data extracted. For the monthly averaged reanalysis and the monthly averaged ensemble members, the accumulation period is 1 day. For the monthly averaged reanalysis by hour of day, the accumulation period is 1 hour and for the monthly averaged ensemble members by hour of day, the accumulation period is 3 hours.

下载数据的时候，在 Product type 中可以选择上面4类中的哪一类:
如果是monthly averaged reanalysis或者monthly averaged ensemble members，那么就除以(3600*24)；
如果是monthly averaged reanalysis by hour of day，那么就除以3600；
如果是monthly averaged ensemble members by hour of day，那么就除以3600*3。

老A

非常感谢答复，请问相关信息是在哪个网址找到的？

付亚男

老A 发表于 2021-10-20 15:19
非常感谢答复，请问相关信息是在哪个网址找到的？

也是官网上，就是你这段话的后面。

老A

付亚男 发表于 2021-10-20 22:17
也是官网上，就是你这段话的后面。

To convert to watts per square metre (W m-2), the accumulated values should be divided by the accumulation period expressed in seconds。这段是我在这里
https://cds.climate.copernicus.e ... -means?tab=overview
“ERA5-Land monthly averaged data from 1981 to present” overview里面的要素介绍中找到的，再多的没有了。那个您这段话具体的网址是哪里能发给我吗？非常感谢！

付亚男

老A 发表于 2021-10-20 22:46
To convert to watts per square metre (W m-2), the accumulated values should be divided by the accu ...

我是在 single levels 里看到的
https://cds.climate.copernicus.e ... -means?tab=overview