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Sap Quantity at Study Sites in the Northeast


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Stinson, K., Rapp, J., Ahmed, S., Lutz, D., Huish, R., Dufour, B., and Morelli, T.L., 2019, Sap Quantity at Study Sites in the Northeast: U.S. Geological Survey data release,


Maple syrup is produced from the sap of sugar maple collected in the late winter and early spring. Native American tribes have collected and boiled down sap for centuries, and the tapping of maple trees is a cultural touchstone for many people in the northeast and Midwest. Because the tapping season is dependent on weather conditions, there is concern about the sustainability of maple sugaring as climate changes throughout the region. Our research addresses the impact of climate on the quantity and quality of maple sap used to make maple syrup. Sap was sampled at 6 sites across the native range of sugar maple over 2 years as part of the ACERnet collaboration. At each site we sampled 15-25 mature sugar maple trees, and an additional [...]


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ACERnet_LatLon.csv 374 Bytes
ACERnet_sap_2012_2017_ID.csv 1.14 MB


Evaluate Climate Effects on Maple Syrup Quality and Yield: Across a latitudinal gradient in the northeastern U.S., we will quantify the effects that climate has on sugar and red maple sap yields and quality. We hypothesize that sap yields and quality vary according to climatic conditions.



  • National and Regional Climate Adaptation Science Centers
  • Northeast CASC

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USGS_MissionArea Climate Adaptation Science Centers

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