TCSIF: A temporally consistent global GOME-2A SIF dataset with correction of sensor degradation

TCSIF: A temporally consistent global GOME-2A SIF dataset with correction of sensor degradation

Description:

The global monthly GOME-2A SIF dataset (2007–2021) with correction of temporal degradation. The corrected global GOME-2 SIF dataset can be obtained in two types. The daily level2 dataset is provided in hdf5 format(compressed in the zip files named "{Year}{Quater}.zip"). The name of the hdf5 files was SIF_daily_YYYYMMDD.h5, YYYY, MM, and DD represent the year, month, and date, respectively. The level3 datasets which were aggregated monthly from the level2 dataset, have a spatial resolution of 0.5°and were saved in TIFF format in chronological order from 2007 to 2021 (compressed in the file "Level3.zip"). The name of the files was SIFpar_evi_monthly _YYYYMM.tif, where SIF was product type, par, and evi represented upscaled parameters, monthly represented temporal scale, YYYY and MM was the year and month, respectively. The SIF output was stored in the hdf5 files along with other variables of interest for further processing and visualization. See the appendix for the structure of the hdf5 file.

cloud_fraction[float]:

Description: Effective cloud fraction derived from GOME-2 Level1B product.

Units: none

latitude[float]:

Description: Pixel center latitude.

Units: degrees N

longitude[float]:

Description: Pixel center longitude.

Units: degrees E

latitude_bounds[float]:

Description: Latitude of the boundary corners for each pixel.

Units: degrees N

longitude _bounds[float]:

Description: Longitude of the boundary corners.

Units: degrees E

SIF_740[float]:

Description: SIF signal at 740nm retrieved using the 735–758 nm fitting window.

Units: mW m-2 nm-1 sr-1

SIF_daily [float]:

Description: SIF signal at 740nm with correction of day-length.

Units: mW m-2 nm-1 sr-1

Sigma_i[float]:

Description:  The squre of single retrieval error of SIF_740.

Units: (mW m-2 nm-1 sr-1)2

Solar_zenith_angle [float]:

Description:  Solar zenith angle.

Units: degrees

Solar_azimuth_angle [float]:

Description: Solar azimuth angle.

Units: degrees

Viewing _zenith_angle [float]:

Description: Viewing zenith angle.

Units: degrees

Viewing_azimuth_angle[float]:

Description: Viewing azimuth angle.

Units: degrees

chi2[float]:

Description: The reduced chi-square value calculated based on the the fitting residuals.

Units: None

Rad_NIR[float]:

Description: The average radiance within the 735~758 nm window

Units: mW m-2 nm-1 sr-1

ps_NIR[float]:

Description: The average reflectance within at around 780 nm.

Units: None

ps_red[float]:

Description: The average reflectance within the 665~680 nm window

Units: None

NDVI[float]:

Description: Calculated by the TOA reflectance at red band (around 680 nm) and near-infrared band (around 780nm).

Units: None