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Showing 111 results for permafrost ...
- Type: Article
Read the abstract and get the link to an article published in Environmental Research Letters that connects vegetation shift to warming Arctic and Boreal soils under vegetation. Kropp, H., M. M. Loranty, S. M. Natali, A. L. Kholodov, A. V. Rocha, … J. A. O’Donnell … et al. 2020. Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems. Environmental Research Letters.
- Type: Article
Read the abstract and link to a paper that describes increasing temperatures and their effects on permafrost in northern parks: Swanson, D. K., P. J. Sousanes, and K. Hill. 2021. Increased mean annual temperatures in 2014-2019 indicate permafrost thaw in Alaskan national parks. Arctic, Antarctic, and Alpine Research 53(1): 1-19.
Denali National Park & Preserve
Denali National Park and Preserve: Resisting Permafrost Thaw Impacts on the Denali Park Road
- Type: Article
Denali National Park and Preserve faces an escalating challenge due to climate change: the historically slow but steadily accelerating collapse down a hillside of the Denali Park Road. This 92-mile scenic route is the only road across six million acres of Denali National Park and Preserve wilderness, and it is an important transportation route for park staff and visitors
Arctic Inventory & Monitoring Network
The role of old carbon in aquatic food webs
- Type: Article
Read a summary and get the link to this article that looks at the use of old carbon in Arctic fish food webs and potential impacts of climate change: Stanek, A.E., Carey, M.P., O'Donnell, J.A., Laske, S.M., Xu, X., Dunton, K.H., von Biela, V.R. 2024. Arctic fishes reveal a gradient in radiocarbon content and use. Limnology and Oceanography Letters.
- Type: Article
In July 2024, fire ecologists re-visited a study area an in Wrangell-St. Elias National Park & Preserve that burned twice in rapid series. The 2009 Chakina Fire burned ~ 56,000 acres in the Chitina River Valley. A mere seven years later, a third of the Chakina fire area reburned in the 2016 Steamboat Fire.
Yellowstone National Park
Midway Geyser Basin Trailhead
- Type: Place
Midway Geyser Basin is small but spectacular. Excelsior Geyser is a 200 x 300 foot crater that constantly discharges more than 4,000 gallons of water per minute into the Firehole River. Grand Prismatic Spring, Yellowstone's largest hot spring, is 200-330 feet in diameter and more than 121 feet deep. Hot SpringsHot springs are the most common hydrothermal features in Yellowstone. Their plumbing has no constrictions. Superheated water cools as it reaches the surface, sinks, and
Blue Ridge Parkway
Asheville Watershed
- Type: Place
Located between Milepost 355 and 370 along the Blue Ridge Parkway, the Asheville Watershed is where Asheville gets it water. It has the capacity to produce and deliver 43 million gallons of water to city residents per day. The North Fork Reservoir, one of two artificial lakes within the watershed, is visible from several overlooks along the Parkway.
- Type: Article
In early December 2007, a series of three Pacific storms struck coastal Oregon and Washington. Later named the “Great Coastal Gale of 2007,” these storms brought in heavy rains, severe temperature swings, and hurricane force winds exceeding 100 miles per hour to Lewis and Clark National Historical Park. Ten years later, the forest looks very different. How is the park using remote sensing technology to monitor landscape change?
Rock Creek Park
Picnic Grove 2
- Type: Place
Picnic Grove 2 is split into north and south sections on opposite sides of the creek. Both sections have sidewalks or multi-use trails that provide safe access to Peirce Mill. Maximum capacity is limited to 25 people per section of the picnic area.
Arches National Park
Delicate Arch Trail
- Type: Place
This trail hikes up 538 feet (164 m) to the most famous arch in the park, crossing open slickrock with no shade. Pass historic Wolfe Ranch and a rock markings panel, then climb steadily; follow the rock cairns and signs. Just before you get to Delicate Arch, the trail traverses a narrow rock ledge for about 200 yards (183 m). Take at least 2 quarts (2 L) of water per person. Roundtrip distance: 3 miles (4.8 km) Time: 2-3 hours
- Type: Article
In the pristine Brooks Range in Arctic Alaska, streams are turning bright orange and fish are disappearing, threatening the well-being of local communities. A recent scientific paper reveals why.
Great Basin National Park
Park Prepares for 2015 Bat Surveys
- Type: Article
White-nose syndrome (WNS) is a serious disease affecting North American bats. It is caused by the fungus Pseudogymnoascus destructans and has resulted in the death of millions of bats in the United States and Canada. Bats are crucial to ecosystem function and provide billions of dollars per year to agriculture in insect suppression services alone. Despite efforts to contain it, WNS continues to spread.
- Type: Article
Read the abstract and get the link to a published paper on how permafrost thaw is releasing metals into streams and turning them orange: O'Donnell, J. A., M. P. Carey, J. C. Koch, C. Baughman, K. Hill, C. E. Zimmerman, P. F. Sullivan, R. Dial, T. Lyons, D. J. Cooper, and B. A. Poulin. 2024. Metal mobilization from thawing permafrost to aquatic ecosystems is driving rusting of Arctic streams. Communications Earth & Environment 5: 268.
Indiana Dunes National Park
Mt. Baldy Beach Trail
- Type: Place
Mount Baldy is 126 feet above the water level of Lake Michigan and is moving inland at about 4 feet per year. Beach sand on the dune moves when the prevailing northwest wind exceeds 7 mph. The movement of Mount Baldy is made worse because there is no longer sand collecting at the water's edge to bolster the dune. Beach erosion is taking away more sand from Mount Baldy than the waves are bringing in due to the breakwall that was built for the Michigan City Harbor.
- Type: Place
This battery was completed and armed in 1900 and featured three 5-inch rapid fire guns designed to defend the offshore minefields against mine sweepers and fast torpedo boats. These guns had a range of seven miles and could be fired at the rate of up to thirty rounds per minute.
Great Basin National Park
Tagging Bats in Great Basin National Park
- Type: Article
Bats are incredibly valuable to humans in terms of ecosystem services. As suppressors of agricultural pests they provide an estimated $40 to $53 billion worth of pest control services per year in the US alone. Yet bats are threatened by a variety of anthropogenic factors. The most pressing issue facing bats in North American is disease. White-nose Syndrome has killed millions of bats in the northeastern US in the last decade.
Great Basin National Park
Quantifying Wildlife at Cave Entrances
- Type: Article
What animals use cave entrances in Great Basin National Park? Remote cameras were deployed to answer that question during the summer of 2013. The cameras took photos when movement triggered them and were active 24 hours a day. Data from eight caves was analyzed. Cameras were deployed for a total of 372 trap days, with an average of 46.5 days per cave (range 28-62).
- Type: Article
The Redwood Fire was ignited by lightning within designated wilderness. Per the parks’ fire and fuels management plan, the confine and contain strategy may be used when it does not pose an unacceptable risk. This fire was discovered less than 1/8 of a mile uphill from the giant sequoias of Redwood Meadow Grove, and near Little Redwood Meadow Grove and Granite Creek Grove. Due to a century of fire exclusion these groves were identified in 2022 as critically at risk.
Arches National Park
Devils Garden Trail
- Type: Place
This trailhead offers a range of hikes, from short to strenuous. Beyond Landscape Arch (listed above), the trail climbs sandstone slabs. Footing is rocky, with narrow ledges, exposure to heights, rock scrambling, and few trail markers. Avoid when rock is wet or snowy. Bring at least 3 quarts (3 L) of water per person. Roundtrip just to Double O Arch: 4.0 miles (6.4 km), 2-3 hours. Whole Trail: 7.9 miles (12.7 km), 3-5 hours
Golden Gate National Recreation Area
Battery Yates
- Type: Place
Compared to other batteries in the region, Battery Yates held relatively small, 3-inch diameter rapid fire rifles, used to protect the bay entrance. In the event of a foreign attack, its guns could fire up to 30 shots per minute at fast moving enemy torpedo boats. During World War II, the guns protected an anti-submarine net that spanned the entrance to the bay.