Southeast Alaska, colloquially referred to as the Alaska(n) Panhandle, is the southeastern portion of the U.S. state of Alaska, bordered to the east and north by the northern half of the Canadian province of British Columbia. The majority of Southeast Alaska's area is part of the Tongass National Forest, the United States' largest national forest. In many places, the international border runs along the crest of the Boundary Ranges of the Coast Mountains. The region is noted for its scenery and mild, rainy climate.
Taiga, generally referred to in North America as a boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches.
Temperate rainforests are coniferous or broadleaf forests that occur in the temperate zone and receive heavy rain.
The Pacific temperate rainforests of western North America is the largest temperate rain forest region on the planet as defined by the World Wildlife Fund. The Pacific temperate rainforests lie along the western side of the Pacific Coast Ranges along the Pacific Northwest Coast of North America from the Prince William Sound in Alaska through the British Columbia Coast to Northern California, and are part of the Nearctic realm, as also defined by the World Wildlife Fund. The Pacific temperate rain forests are characterized by a high amount of rainfall, in some areas more than 300 cm (10 ft) per year and moderate temperatures in both the summer and winter months.
Crucial to the survival of a glacier is its mass balance or surface mass balance (SMB), the difference between accumulation and ablation. Climate change may cause variations in both temperature and snowfall, causing changes in the surface mass balance. Changes in mass balance control a glacier's long-term behavior and are the most sensitive climate indicators on a glacier. From 1980 to 2012 the mean cumulative mass loss of glaciers reporting mass balance to the World Glacier Monitoring Service is −16 m. This includes 23 consecutive years of negative mass balances.
Alaska occupies the northwestern portion of the North American continent and is bordered only by Canada on the east. It is one of two U.S. states not bordered by another state; Hawaii is the other. Alaska has more ocean coastline than all of the other U.S. states combined. About 500 miles (800 km) of Canadian territory separate Alaska from Washington state. Alaska is thus an exclave of the United States that is part of the continental U.S. and the U.S. West Coast, but is not part of the contiguous U.S. Alaska is also the only state, other than Hawaii, whose capital city is accessible only via ship or air, because no roads connect Juneau to the rest of the continent.
The climate of Alaska is determined by average temperatures and precipitation received statewide over many years. The extratropical storm track runs along the Aleutian Island chain, across the Alaska Peninsula, and along the coastal area of the Gulf of Alaska which exposes these parts of the state to a large majority of the storms crossing the North Pacific. The climate in Juneau and the southeast panhandle is a mid-latitude oceanic climate, in the southern sections and a subarctic oceanic climate in the northern parts. The climate in Southcentral Alaska is a subarctic climate due to its short, cool summers. The climate of the interior of Alaska is best described as extreme and is the best example of a true subarctic climate, as the highest and lowest recorded temperatures in Alaska have both occurred in the interior. The climate in the extreme north of Alaska is an Arctic climate with long, cold winters, and cool summers where snow is possible year-round.
Major environmental issues caused by contemporary climate change in the Arctic region range from the well-known, such as the loss of sea ice or melting of the Greenland ice sheet, to more obscure, but deeply significant issues, such as permafrost thaw, social consequences for locals and the geopolitical ramifications of these changes. The Arctic is likely to be especially affected by climate change because of the high projected rate of regional warming and associated impacts. Temperature projections for the Arctic region were assessed in 2007: These suggested already averaged warming of about 2 °C to 9 °C by the year 2100. The range reflects different projections made by different climate models, run with different forcing scenarios. Radiative forcing is a measure of the effect of natural and human activities on the climate. Different forcing scenarios reflect, for example, different projections of future human greenhouse gas emissions.
The climate of the Arctic is characterized by long, cold winters and short, cool summers. There is a large amount of variability in climate across the Arctic, but all regions experience extremes of solar radiation in both summer and winter. Some parts of the Arctic are covered by ice year-round, and nearly all parts of the Arctic experience long periods with some form of ice on the surface.
The climate of the United States varies due to changes in latitude, and a range of geographic features, including mountains and deserts. Generally, on the mainland, the climate of the U.S. becomes warmer the further south one travels, and drier the further west, until one reaches the West Coast.
Climate change in Russia has serious effects on Russia's climate, including average temperatures and precipitation, as well as permafrost melting, more frequent wildfires, flooding and heatwaves. Changes may affect inland flash floods, more frequent coastal flooding and increased erosion reduced snow cover and glacier melting, and may ultimately lead to species losses and changes in ecosystem functioning.
The climate of Norway is more temperate than could be expected for such high latitudes. This is mainly due to the North Atlantic Current with its extension, the Norwegian Current, raising the air temperature; the prevailing southwesterlies bringing mild air onshore; and the general southwest–northeast orientation of the coast, which allows the westerlies to penetrate into the Arctic. The January average in Brønnøysund is 14.6 °C (58.3 °F) warmer than the January average in Nome, Alaska, even though both towns are situated on the west coast of the continents at 65°N. In July, the difference is reduced to 2.9 °C (5.2 °F). The January average of Yakutsk, in Siberia but slightly further south, is 42.3 °C (108.1 °F) colder than in Brønnøysund.
Climate change in Norway discusses global warming issues that affect Norway, whose territory comprises the western portion of the Scandinavian Peninsula plus the island Jan Mayen and the archipelago of Svalbard. All regions and seasons of Norway are expected to become warmer and wetter due to climate change.
The Japanese temperate rainforest is located in the Japanese archipelago, in small batches over a wide range of islands, from Kyushu in the South to Hokkaido in the North. Due to its geographic features and climate, the Japanese temperate rainforest is very different from other temperate rainforests in the world. The islands in the Japanese archipelago comprise about 1/400 of the world’s land. The islands are located on a latitude that is normally dry; desert can be found elsewhere in the world at this latitude. However, the oceans surrounding Japan provide enough precipitation to maintain a temperate rainforest.
Yellow-cedar decline is the accelerated decline and mortality of yellow cedar occurring in the Pacific Northwest Temperate Rainforest of Southeast Alaska and British Columbia in North America. This phenomenon has been observed on over 200,000 hectares of forest and is believed to be due to reduced winter snowpacks and increased soil freezing.
Climate change is having a considerable impact in Malaysia. Increasing temperatures are likely to greatly increase the number of heatwaves occurring annually. Variations in precipitation may increase the frequency of droughts and floods in various local areas. Sea level rise may inundate some coastal areas. These impacts are expected to have numerous environmental and socioeconomic effects, exacerbating existing environmental issues and reinforcing inequality.
Climate change in Austria is affecting Austrian temperatures, weather, ecosystems and biodiversity. Since 1950 temperatures have risen by 1.8 °C, and in the past 150 years glaciers have melted, losing a significant amount of their volume. Changed precipitation patterns, increased temperatures, reduced snowfall, melting glaciers and more frequent extreme weather phenomenon, such as droughts, are expected effects from climate change. Ecosystems and biodiversity in Austria are facing changes due to increasing temperatures and the spread of thermophile species, heat and drought stress on animals and plants, an increase in alien and invasive species and an increase in pathogenic organisms and the spread of disease.
The North American inland temperate rainforest is a 7 million hectare disjunct temperate rainforest spreading over parts of British Columbia in Canada as well as Washington, Idaho and Montana on the US side. Its patches are located on the windward slopes of the Rocky Mountains and the Columbia Mountains, extending roughly over 1000km from 54° North to 45° North. It is one of the largest inland temperate and boreal rainforests in the world.
The Maybeso Experimental Forest is an experimental forest on Prince of Wales Island in Alaska. It is located near Hollis, Alaska within the Tongass National Forest and is administered by the United States Forest Service. The area of the forest is approximately 1,101 acres (446 ha), with a peak elevation of 2,953 feet (900 m). The forest was established in 1956 to examine the effects of large-scale clearcut timber harvesting on forest regeneration and anadromous salmonid spawning areas. The Maybeso Experimental Forest is the site of the first large-scale clearcut logging operation in Southeast Alaska, and nearly all commercial forest was removed from the area between 1953 and 1960. Presently, the forest is an even-aged, second-growth Sitka spruce and Western hemlock forest.
