tsgettoolbox.tsgettoolbox.ldas_smerge

tsgettoolbox.tsgettoolbox.ldas_smerge(lat=None, lon=None, variables=None, startDate=None, endDate=None, variable=None)

global:0.125deg:1997-:D:SMERGE-Noah-CCI root zone soil moisture

The time zone is always UTC.

SoilMERGE (SMERGE) is a new root-zone soil moisture (RZSM) product that covers the entire continental United States. A fundamental limiting factor that constrains agricultural productivity is RZSM. Also delineation of RZSM is important for drought monitoring and RZSM is considered a critical climate variable.

This product is developed based on merging NLDAS land surface model output with surface satellite retrievals from the European Space Agency (ESA) Climate Change Initiative (CCI). Therefore, unlike other observational soil moisture products SMERGE spans nearly four decades (1979 to 2019). The product has a 0.125o spatial resolution at a daily time step.

A key initial user for SMERGE will be the USDA Northern Plains Regional Climate Hub (NPRCH). Stakeholder input will be solicited during the initial phases of product development. This effort will maximize the utility of SMERGE to diverse users who have an interest in long-term analysis of RZSM to support activities in the areas of water and land management and within the agricultural sector.

Description/Name

Spatial

Lat Range

Lon Range

Time

Smerge-Noah-CCI root zone soil moisture 0-40 cm SMERGE_RZSM0_40CM V2.0

0.125x0.125

25, 53

-125, -67

1 day 1979-01-02 to recent
Parameters:

  • lat (float) – Latitude (required): Enter single geographic latitude point. Use positive values for the northern hemisphere and negative for the southern hemisphere. The valid range is specified in the table above.

  • lon (float) – Longitude (required): Enter single geographic longitude point. Use positive for the eastern hemisphere and negative for the western hemisphere. The valid range is specified in the table above.

  • variables (str) –

    For the command line a comma separated string of variable codes from the following table. Using the Python API a list of variable strings. Valid variable names are specified in the table below.

    LDAS “variables” string

    Description

    Units

    SMERGE_RZSM0_40CM_2_0_CCI_ano

    CCI soil moisture anomalies 0-40 cm

    m3/m3

    SMERGE_RZSM0_40CM_2_0_RZSM

    Average soil moisture of 0-40 cm layer

    m3/m3

  • startDate (str) –

    The start date of the time series.:

    Example: --startDate=2001-01-01T05

    If startDate and endDate are None, returns the entire series.

  • endDate (str) –

    The end date of the time series.:

    Example: --endDate=2002-01-05T05

    If startDate and endDate are None, returns the entire series.

  • variable (str) – DEPRECATED: use “variables” instead to be consistent across “tsgettoolbox”.