.. _gen_NLDAS2_85:

National Land Data Assimilation Product V2  - Water Year 1985
^^^^^^^^^^^^^^^^^^

The NLDAS2 forcing dataset at 1km resolution and a 1 hour time step.  This dataset was used to force the `conus1_baseline_85 <https://hf-hydrodata.readthedocs.io/en/latest/gen_conus1_baseline_85.html>`_ simulation.  This dataset is bilinearly interpolated to the ParFlow CONUS1 grid.  The original NLDAS2 dataset can be found `here <https://ldas.gsfc.nasa.gov/nldas>`_.

**Dataset Name**: NLDAS2_85

**Data Collection or Processing Notes:**

    Bilinearly interpolated from the native resolution to 1km.

**Citations:**

Please refer to the following citations for more information on this dataset and cite them if you use the data

* https://doi.org/10.1002/2016GL069964

**Extent and Resolution**:

* Available Date Range: 1984-10-01 to 1985-09-30

* Grid: conus1

  - Spacial Resolution:  1000 meters

  - XY Grid Spacial Extent:  3342 x 1888

  - LatLon Spacial Exent:  -121.47939483437318, 31.651836025255015,  -76.09875469594509, 50.49802132270979

  - Origin (meters): -1885055.4995, -604957.0654

  - Projection: +proj=lcc +lat_1=33 +lat_2=45 +lon_0=-96.0 +lat_0=39 +a=6378137.0 +b=6356752.31

Variables
^^^^^^^^^^^^^^^^^^

This describes the available variables of the dataset.
Use the dataset, variables and temporal_resolution in python access functions as described in the Working with Gridded Data, and Working with Point Observations.

.. list-table:: Atmospheric Variables
    :widths: 25 60 30 20 20 20 20
    :header-rows: 1

    * - variable
      - description
      - temporal_resolution
      - units
      - aggregation
      - grid
      - 3D
    * - precipitation
      - Precipitation
      - daily, monthly
      - mm
      - sum
      - conus1
      - no
    * - downward_longwave
      - Downward longwave radiation
      - daily
      - w/m2
      - mean
      - conus1
      - no
    * - downward_shortwave
      - Downward shortwave radiation
      - daily
      - w/m2
      - mean
      - conus1
      - no
    * - specific_humidity
      - Specific humidity
      - daily
      - kg/kg
      - mean
      - conus1
      - no
    * - air_temp
      - Air temperature
      - daily, monthly
      - K
      - mean, min, max
      - conus1
      - no
    * - east_windspeed
      - Zonal windspeed
      - daily
      - m/s
      - mean
      - conus1
      - no
    * - north_windspeed
      - Meridional windspeed
      - daily
      - m/s
      - mean
      - conus1
      - no
    * - atmospheric_pressure
      - Atmospheric pressure
      - daily
      - pa
      - mean
      - conus1
      - no