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@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix gcis: <http://data.globalchange.gov/gcis.owl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix dbpprop: <http://dbpedia.org/property/> .
@prefix bibo: <http://purl.org/ontology/bibo/> .
@prefix fabio: <http://purl.org/spar/fabio/> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix biro: <http://purl.org/spar/biro/> .
@prefix cito: <http://purl.org/spar/cito/> .

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   dcterms:identifier "indicator-frost-free-season-2019";
   dcterms:title "Indicator: Frost Free Season"^^xsd:string;
   dbpprop:pubYear "2019"^^xsd:gYear;
   gcis:hasURL "http://www.globalchange.gov/browse/indicators/indicator-frost-free-season"^^xsd:anyURI;
   dcterms:description "Key Points:   \r\n\r\n1. Observed changes in the length of the frost-free season, defined as the number of frost-free days in a year, reflect the overall warming trend in the climate system. The bars on the graph show the difference between the number of frost-free days in each year and the average number of frost-free days from 1979 to 2017.   \r\n\r\n2. During the past 30 years, there has been an increase in the length of the frost-free season over the contiguous United States and Alaska, relative to the 1979–2017 average.   \r\n\r\n3. This indicator can inform decisions about agricultural and natural resource management, including crop planning and wildfire risk management.   \r\n\r\nFull Summary:   \r\n\r\nDuring the past 30 years, there has been an increase in the length of the frost-free season (defined as the number of frost-free days in a year) over the contiguous United States and Alaska, relative to the 1979–2017 average. This change in the frost-free season reflects the overall warming trend in the climate system. The bars on the graph show the difference between the number of frost-free days in each year and the average number of frost-free days from 1979 to 2017. Global daily freeze-thaw data are provided by the National Aeronautics and Space Administration (NASA) Freeze-Thaw Earth Systems Data Record, which represents one of the longest continuous global records from satellite-based observations. Satellite microwave sensors are used to determine the frozen or thawed status of water on the land surface at a given time. Measurements are taken over the contiguous United States and Alaska and include all vegetated land areas where seasonal frozen temperatures are a major constraint to plant growth. Collecting these data over time provides information on the number of frost-free days in a given year. The frost-free season can be an important factor in determining the potential growing season for vegetation. This indicator can help decision makers understand and anticipate possible impacts on agricultural and natural resource sectors. For instance, some pests and pathogens affecting forests and crops are projected to benefit from warmer temperatures and longer frost-free seasons. A lengthening frost-free season may also impact habitat conditions and wildfire risk."^^xsd:string;

## A report can either be a report, assessment, or technical input
   dcterms:type "indicator";

## Frequency of report release:

## Report topic(s):

## Report chapter(s):

## Report figure(s):
   gcis:hasFigure <https://data.globalchange.gov/report/indicator-frost-free-season-2019/figure/indicator-frost-free-season-2019>;

## Report table(s):
   gcis:hasTable <https://data.globalchange.gov/report/indicator-frost-free-season-2019/table/indicator-frost-free-season-2019>;

## Report finding(s):

## Region(s):
  
   a gcis:Report, fabio:Report .


<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1007/s10584-006-9051-4>;
   biro:references <https://data.globalchange.gov/reference/00df3fab-4c55-4454-b801-e58e9ace65d6>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1007/s00382-004-0442-9>;
   biro:references <https://data.globalchange.gov/reference/030d2564-c07e-434b-8266-ec7cf11309ee>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1002/hyp.8350>;
   biro:references <https://data.globalchange.gov/reference/0351fcd3-7c9d-4c50-b531-008c1de4d237>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/webpage/measures-global-record-of-daily-landscape-freeze-thaw-status-version-2>;
   biro:references <https://data.globalchange.gov/reference/1f6f45b2-0184-48dd-b785-1578793c2788>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1016/j.rse.2012.02.014>;
   biro:references <https://data.globalchange.gov/reference/3e433145-7877-40f6-aa98-4710405483e3>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/book/8db8d893-2bc3-4c51-9841-4176921122b2>;
   biro:references <https://data.globalchange.gov/reference/931268c4-a7c9-4bef-b657-8d3d97e6bd3f>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1109/TGRS.2010.2070515>;
   biro:references <https://data.globalchange.gov/reference/9d81e81a-40a0-4014-90cd-f11084aba004>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.3354/cr019193>;
   biro:references <https://data.globalchange.gov/reference/ebad5042-325a-41aa-915d-c120fd195b6c>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/article/10.1016/j.rse.2004.01.002>;
   biro:references <https://data.globalchange.gov/reference/eceab15b-6fbe-4cfe-8a7a-8b6c919bd70a>.

<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   cito:cites <https://data.globalchange.gov/report/nca3/chapter/our-changing-climate>;
   biro:references <https://data.globalchange.gov/reference/f4e9b185-8a53-4e97-8bcd-f92ed932ea5f>.



<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   prov:wasDerivedFrom <https://data.globalchange.gov/report/indicator-frost-free-season-2018>.



## Person and his/her role in the creation of the entity:
<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   prov:qualifiedAttribution [
      a prov:Attribution;
      prov:agent <https://data.globalchange.gov/person/2200>;
      prov:hadRole <https://data.globalchange.gov/role_type/point_of_contact>;
      prov:actedOnBehalfOf <https://data.globalchange.gov/organization/us-environmental-protection-agency>;
      ] .

## Person and his/her role in the creation of the entity:
<https://data.globalchange.gov/report/indicator-frost-free-season-2019>
   prov:qualifiedAttribution [
      a prov:Attribution;
      prov:agent <https://data.globalchange.gov/person/2543>;
      prov:hadRole <https://data.globalchange.gov/role_type/point_of_contact>;
      prov:actedOnBehalfOf <https://data.globalchange.gov/organization/university-montana>;
      ] .

## This entity was produced by an organization:     
<https://data.globalchange.gov/report/indicator-frost-free-season-2019>    
   prov:qualifiedAttribution [
      a prov:Attribution;
      prov:agent <https://data.globalchange.gov/organization/national-aeronautics-space-administration>;
      prov:hadRole <https://data.globalchange.gov/role_type/data_producer>;
      ] .

## This entity was produced by an organization:     
<https://data.globalchange.gov/report/indicator-frost-free-season-2019>    
   prov:qualifiedAttribution [
      a prov:Attribution;
      prov:agent <https://data.globalchange.gov/organization/national-snow-ice-data-center>;
      prov:hadRole <https://data.globalchange.gov/role_type/data_producer>;
      ] .