code: def load_nh4(**kwargs):
      """
      Ammonium (NH4) concentration (mg/L) in precipitation measured at Olympic National Park, Hoh Ranger Station (WA14), weekly or every other week from January 6, 2009 through December 20, 2011.
  
      Reference
      -----------
      National Atmospheric Deposition Program, National Trends Network (NADP/NTN).
      http://nadp.slh.wisc.edu/data/sites/siteDetails.aspx?net=NTN&id=WA14
      http://nadp.isws.illinois.edu/NTN/
  
      ::
  
          Size: (104,3)
  
      """
      return _load_dataset("nh4.csv", index_col=[0], **kwargs)
  
imports: import pandas
  from importlib import resources
label_desc: Use image node_id 15 for calling a global function with example usage: load_nh4() and returns: _load_dataset