Filters: Categories: Data (X) > Date Range: {"choice":"week"} (X) > Tags: {"type":"theme"} (X)
7 results (128ms)|
Filters
Date Types (for Date Range)
Types Contacts Tag Schemes
|
In recent decades, Rocky Mountain accumulated snowpack levels have experienced rapid declines, yet long-term records of snowpack prior to the installation of snowpack observation stations in the early and mid 20th century are limited. To date, a small number of tree-ring based reconstructions of April 1 Snow Water Equivalent (SWE) in the northern Rocky Mountains have extended modern records of snowpack variability to ~1200 C.E. Carbonate isotope lake sediment records, provide an opportunity to further extend tree-ring based reconstructions through the Holocene, providing a millennial-scale temporal record that allows for an evaluation of multi-scale drivers of snowpack variability, from internal climate dynamics...
A combination of altered fire regimes and pathogens has contributed towards densification and encroachment by shade-tolerant species into areas traditionally dominated by whitebark pine. As such, the CMP Hi5 Working Group technical team suggest canopy cover as a proxy for species encroachment. Stands with tree cover greater than 60% suggest successional species are outcompeting whitebark pine.
A warmer climate has increased the spread of mountain Pine beetle. Historically, mountain pine beetle populations were limited to southern regions due to cold temperature intolerance. However, increasing winter temperatures has allowed the species to spread further north, contributing to the loss of over 1 million ha of forest in the United States and 9 million ha in Canada.Data on mountain pine beetle damage was compiled by CMP Hi5 Working Group technical team. Aerial detection surveys between 1999–2020 for Montana, Alberta, and Waterton Lakes National Park were compiled and assigned a severity score using the USDA Forest Service classification system. Severity is based on crown mortality from aerial images, with...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AGRICULTURAL PLANT SCIENCE,
AGRICULTURE,
Data,
EARTH SCIENCE,
Mountain Pine Beetle,
The introduction of white pine blister rust, a fungus from Eastern Asia introduced to North America in the early 1900s, has inhibited the persistence of whitebark pine. Once white pine blister rust infects a tree, the fungus girdles branches and then main stem, eventually killing the tree. Since its introduction, white pine blister rust has continued to spread throughout North America with minimal environmental limitations. Within the Crown of the Continent ecosystem, up to 57% of trees have been infected or died due to white pine blister rust.At the time of this analysis, no geospatial data exists for white pine blister rust within the Crown landscape. However, because this rust is most abundant in cool and wet...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AGRICULTURAL PLANT SCIENCE,
AGRICULTURE,
Blister Rust,
Data,
EARTH SCIENCE,
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Climate Reconstruction. The data include parameters of climate reconstructions|instrumental|tree ring with a geographic location of North America. The time period coverage is from 1150 to -65 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
As a result of climate change, a warmer and drier climate has led to an increase in wildfire. Severe wildfires can cause whitebark pine mortality during all life stages, thus we used data on wildfire severity throughout the Crown landscape to predict where future severe fires will occur. Spatial data on wildfire severity was compiled by the CMP Hi5 Working Group technical team and ranked using a consistent categorical system based on each state/province’s assigned severity. Areas that had moderate-to-severe wildfires in the past 30 years were considered low risk.
Categories: Data;
Tags: Data,
EARTH SCIENCE,
EARTH SCIENCE,
ENVIRONMENTAL GOVERNANCE/MANAGEMENT,
FIRE MANAGEMENT,
As a result of climate change, a warmer and drier climate has led to an increase in wildfire severity. Severe wildfires can cause whitebark pine mortality during all life stages. Conversely, low intensity fires may enhance whitebark pine persistence by removing competing species that are less fire tolerant. However, low intensity fires have been suppressed because of an increase in recreational development and urbanization. Thus, a decline in low intensity fires has reduced whitebark pine persistence by increasing species encroachment while simultaneously, increases in wildfire severity are increasing whitebark pine mortality
|
|
