< p > <强>帮助请求< /强> < / p > < p >谁知道< a href = " https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/ " rel = " nofollow noreferrer " > MERRA2 < / >包含每小时全球水平照度(GHI)数据,或其他测量,我们可以使用它来计算全球健康行动计划?,如果是这样,你能让我知道吗?< / p > < p > < >强背景< /强> < / p > < p >我试图用< a href = " https://pvlib-python.readthedocs。io / en /稳定/ nofollow noreferrer“rel = > < / > PVLib图书馆在python中计算估计各种太阳能农场在世界各地的太阳能发电。PVLib估计全球健康行动计划,可以直接正常发光(DNI)和扩散水平照度(济),但是我希望能带来实际的数据。< / p > < p > < >强研究和自己的发现< /强> < / p > < p >我用MERRA-2数据之前源温度和风速每小时。所以我就先来寻找GHI数据。< / p > < p >我看< a href = " https://disc.gsfc.nasa.gov/ " rel = " nofollow noreferrer " > GES光盘目录< / >各种MERRA2再分析文件。我发现M2T1NXRAD (< a href = " https://disc.gsfc.nasa.gov/datasets/M2T1NXRAD_5.12.4/summary?中找到关键词= % 22 merra-2 % 22 nofollow noreferrer“rel = > < / >),认为因为它包含辐射数据,它将包含全球健康行动计划,但我没有看到任何看起来像酥油在字段列表中(< a href = " https://gmao.gsfc.nasa.gov/pubs/docs/Bosilovich785.pdf " rel = " nofollow noreferrer " > < / >)。我确实发现“表面事件短波通量(SWGDN)”, but I am not a meteorologist and don't know how this relates to GHI, or if it can even be converted to GHI? Browsing the internet, it does look like there is some relation between SWGDN and GHI. I've seen many publications allude to it (such as here and here) but I wasn't able to figure out how they are calculating it.
an extract from the above article states
MERRA-2 uses the Goddard Earth Observing System version 5 (GEOS-5) atmospheric model and data assimilation system (DAS). The dataset offers two-dimensional diagnostics of surface fluxes, single level meteorology, vertical integrals and land states, generated at 1 hourly, 3 hourly, daily and monthly intervals. This paper utilises the surface incident shortwave flux (SWGDN) from the single-level diagnostic tavgM_2d_rad_Nx data product averaged over a monthly interval (NASA 2017).
But it doesn't say how to convert SWGDN to GHI? if anyone knows how these two measures relate to one another, I would love an explanation!