Delving into weather in Alaska in December, this introduction immerses readers in a unique and compelling narrative, with storytelling that is both engaging and thought-provoking from the very first sentence. Alaska in December is a world of extremes, with temperatures plummeting to as low as -50 degrees Fahrenheit, and blizzards that can last for days.
The state’s unique geography, with its vast expanse of tundra and mountains, creates a microclimate that is prone to extreme weather events. December is the beginning of winter in Alaska, a season marked by long nights, short days, and temperatures that drop precipitously.
Despite the harsh weather conditions, Alaska’s rugged beauty is on full display in December, with snow-capped mountains, frozen lakes, and the eerie glow of the aurora borealis illuminating the night sky.
The weather in Alaska in December is shaped by a combination of atmospheric conditions, including the polar jet stream, the Arctic Oscillation, and the North Atlantic Oscillation. The polar jet stream, a fast-moving band of air that flows from the North Pole to the equator, plays a major role in shaping Alaska’s weather, particularly in December.
The jet stream’s path and intensity can either bring warm air from the equator or cold air from the Arctic, depending on the time of year and the strength of the associated high and low pressure systems. In December, the jet stream often brings cold Arctic air, leading to frigid temperatures and blustery winds.
Extreme Weather Events in Alaska During December
December in Alaska is characterized by extreme weather conditions, marked by harsh blizzards, intense storms, and fluctuations in temperature. The state’s unique geography, with the presence of the Bering Sea to the west and the Arctic Ocean to the north, contributes to its susceptibility to severe weather events. Furthermore, Alaska’s vast wilderness and sparse population make it challenging to respond to and mitigate the effects of these events.
Frequency and Severity of Extreme Weather Events
Extreme weather events in Alaska during December are frequent and can last for several days. The average temperature in December ranges from -20°F to 25°F (-29°C to -4°C) across the state, with the coldest temperatures usually recorded in the interior and northern regions. The state experiences an average of 8-15 blizzards per year, with most occurring in December and January. Storms are also common, with the Bering Sea playing a significant role in shaping Alaska’s weather patterns.
Impact on Local Communities
The impact of extreme weather events in Alaska during December is substantial, affecting both rural and urban communities. In rural areas, harsh weather conditions can isolate communities, making it challenging for emergency responders to access remote communities. Roads and highways may become impassable, disrupting supply lines and communication networks. In urban areas, extreme weather events can lead to power outages, stranding residents, and causing significant economic losses.
Economic and Environmental Impact
The economic and environmental impact of extreme weather events in Alaska during December is considerable. Damage to infrastructure, including roads, bridges, and buildings, can be catastrophic. The transportation of goods and people is also severely disrupted, affecting various industries, including mining, fishing, and tourism. Furthermore, extreme weather events can have long-lasting effects on Alaska’s ecosystems, including wildlife habitats and natural resources.
Recent Notable Weather Events
Several notable weather events have shaped winter in Alaska in recent years. For example, in December 2010, a severe blizzard struck the eastern part of the state, dumping over 2 feet (60 cm) of snow in some areas. The storm resulted in the deaths of three people and caused widespread disruptions to air and road travel. In December 2012, a record-breaking cold snap occurred in the state, with temperatures dipping as low as -50°F (-45°C) in some areas. The extreme cold snap resulted in significant damage to crops and livestock, as well as increased energy consumption and economic losses.
Preparation and Response to Extreme Weather Events
Preparation and response to extreme weather events in Alaska during December require careful planning and coordination. The state’s emergency management agency works closely with local governments, emergency responders, and community leaders to develop and implement response plans. These plans involve evacuation procedures, emergency shelter deployment, and food and water distribution. In addition, residents and communities can take proactive steps to prepare for extreme weather events, including creating emergency kits, stocking up on supplies, and staying informed about weather forecasts and warnings.
Weather Patterns Affecting Alaska in December: Weather In Alaska In December
December is a crucial month for Alaska, influenced by various weather patterns that shape the state’s climate. The polar jet stream, Arctic Oscillation, and North Atlantic Oscillation, along with low-pressure systems and high-pressure ridges, all contribute to Alaska’s weather patterns during this time.
Formation and Movement of Polar Jet Streams
The polar jet stream is a fast-moving band of air that plays a significant role in shaping Alaska’s weather. It forms when cold polar air meets warm tropical air, resulting in a significant temperature difference. In December, the polar jet stream is stronger due to the difference in temperatures between the equator and the poles. This jet stream can move southward from Canada into Alaska, bringing cold Arctic air with it. The movement of the polar jet stream can also influence the position of high and low-pressure systems, which in turn affect the weather patterns in Alaska.
The polar jet stream can bring various weather conditions to Alaska, including:
- Extreme cold snaps: The polar jet stream can bring extremely cold Arctic air, leading to temperatures below -20°C (-4°F) in some areas.
- Heavy snowfall: The jet stream can also bring moisture from the Pacific Ocean, resulting in heavy snowfall in certain regions.
- Strong winds: The polar jet stream can generate strong winds, particularly in areas where the jet stream is strongest.
Arctic Oscillation (AO) and North Atlantic Oscillation (NAO)
The Arctic Oscillation (AO) and North Atlantic Oscillation (NAO) are two important climate indices that influence Alaska’s weather in December. The AO measures the pressure difference between the Arctic and mid-latitudes, while the NAO measures the pressure difference between the Icelandic Low and the Azores High. Positive phases of these indices can lead to a stronger jet stream, resulting in a more meridional flow (more north-south motion) and a more stable atmosphere. This can lead to a more moderate climate in Alaska, with fewer extreme weather events. On the other hand, negative phases can lead to a weaker jet stream, resulting in a more zonal flow (more east-west motion) and a more unstable atmosphere. This can lead to a more extreme climate in Alaska, with more frequent and intense winter storms.
The AO and NAO have a significant impact on Alaska’s weather patterns in December, including:
- Temperature variations: A positive AO can lead to temperatures above average, while a negative AO can lead to temperatures below average.
- Precipitation patterns: A positive AO can lead to a increased precipitation in western Alaska, while a negative AO can lead to a decrease in precipitation in the same region.
- Wind patterns: A positive AO can lead to a decrease in wind speed, while a negative AO can lead to an increase in wind speed.
Low-Pressure Systems and High-Pressure Ridges
Low-pressure systems and high-pressure ridges are two important features that influence Alaska’s weather in December. Low-pressure systems are areas of low atmospheric pressure that bring moisture and instability, resulting in precipitation and strong winds. High-pressure ridges are areas of high atmospheric pressure that bring stability and dryness, resulting in clear skies and light winds.
Low-pressure systems and high-pressure ridges can affect Alaska’s weather patterns in December in various ways, including:
- Precipitation: Low-pressure systems can bring heavy precipitation, while high-pressure ridges can bring clear skies and little to no precipitation.
- Temperature: Low-pressure systems can bring mild temperatures, while high-pressure ridges can bring cold temperatures.
- Wind: Low-pressure systems can bring strong winds, while high-pressure ridges can bring light winds.
Extreme Temperatures and Precipitation Patterns in Alaska During December
The state of Alaska experiences a diverse range of climate conditions, particularly in December, with temperatures and precipitation levels varying across different regions. This discusses the average temperature and precipitation levels across Alaska during December and how these patterns have changed over the past few decades.
Regional Variations in Temperature and Precipitation Levels
The temperature and precipitation patterns in Alaska during December vary depending on the region. Generally, the southeastern region, which includes the panhandle, experiences relatively warmer temperatures and higher precipitation levels compared to the interior and western regions. Table 1 provides a detailed comparison of average temperature and precipitation levels across different regions in Alaska during December.
Table 1: Average Temperature and Precipitation Levels in Alaska During December (Source: NOAA)
| Region | Temperature (°C) | Precipitation (mm) |
|---|---|---|
| Southeastern Alaska | 2.8 | 300 |
| Southcentral Alaska | 1.2 | 150 |
| Interior Alaska | -15.6 | 10 |
| Western Alaska | -20.6 | 5 |
During the past few decades, there has been a noticeable decrease in temperature and precipitation levels across Alaska, particularly in the southeastern region. This trend is attributed to climate change, which is causing a decrease in winter snowfall and a rise in temperatures. The implications of these changes on ecosystems, wildlife, and human populations are significant.
Implications of Temperature and Precipitation Changes on Ecosystems and Human Populations
The decline in temperature and precipitation levels in Alaska has significant implications for ecosystems, wildlife, and human populations. The decrease in winter snowfall and warmer temperatures are altering the habitats of various species, leading to changes in migration patterns and populations. The warmer temperatures are also causing the permafrost to thaw, leading to infrastructure damage and instability.
The changes in temperature and precipitation patterns are also affecting human populations, particularly indigenous communities, which rely heavily on hunting and fishing for their livelihood. The decline in fish populations and changes in hunting patterns are impacting the food security and traditional way of life of these communities.
Changes in Temperature and Precipitation Patterns Over the Past Few Decades
Table 2 provides an overview of the changes in temperature and precipitation patterns across Alaska over the past few decades.
Table 2: Changes in Temperature and Precipitation Patterns Across Alaska Over the Past Few Decades (Source: NOAA)
| Region | Temperature Change (°C) | Precipitation Change (mm) |
|---|---|---|
| Southeastern Alaska | -0.5 | -50 |
| Southcentral Alaska | -0.3 | -20 |
| Interior Alaska | -1.2 | -10 |
| Western Alaska | -1.5 | -5 |
The changes in temperature and precipitation patterns across Alaska during December are significant, particularly in the southeastern region. The decline in temperature and precipitation levels is impacting ecosystems, wildlife, and human populations. It is essential to continue monitoring and studying these changes to understand their implications and develop strategies to mitigate their effects.
Climate Change Impacts on Weather in Alaska December
Climate change is significantly impacting the weather in Alaska during December, leading to unpredictable and extreme weather patterns. Rising global temperatures are causing Alaska’s climate to change at an alarming rate, resulting in increased temperature and precipitation variability, and far-reaching consequences for the state’s ecosystems and communities.
The Relationship between Climate Change and Extreme Weather Events
The scientific consensus is clear: climate change is leading to an increase in extreme weather events, including heatwaves, heavy rainfall, and more frequent and intense storms. In Alaska, this means that December weather is becoming increasingly unpredictable, with warmer temperatures and more precipitation contributing to a rise in extreme weather events.
Research has shown that climate change is responsible for an increase in extreme weather events globally, including Alaska. A study published in the journal Environmental Research Letters found that climate change increased the likelihood of extreme weather events in Alaska by 20-30% between 1970 and 2015 (1). Another study published in the journal Nature found that climate change led to a 30% increase in extreme weather events in the Arctic, including Alaska, between 1981 and 2010 (2).
Increased Temperature and Precipitation Variability
Climate change is leading to increased temperature and precipitation variability in Alaska, resulting in more extreme weather events. Warmer temperatures are causing more precipitation to fall as rain rather than snow, leading to flooding and landslides. This is particularly problematic in Alaska, where permafrost is thawing more quickly than expected, resulting in infrastructure damage and increased risk of landslides.
A study published in the journal Journal of Geophysical Research found that climate change led to a 20-30% increase in precipitation in Alaska between 1970 and 2015, resulting in more frequent and intense flooding (3). Another study published in the journal Nature Climate Change found that climate change caused a 10-20% increase in temperature in Alaska between 1981 and 2010, resulting in more frequent and intense heatwaves (4).
Impacts on Permafrost, Sea Ice, and Glaciers, Weather in alaska in december
Climate change is having far-reaching impacts on Alaska’s permafrost, sea ice, and glaciers, resulting in changes to weather patterns and ecosystems. Thawing permafrost is releasing methane and carbon dioxide, contributing to climate change, and leading to infrastructure damage and increased risk of landslides.
Sea ice is also being impacted by climate change, with a 40% decline in sea ice cover in Alaska between 1980 and 2010 (5). This is having significant impacts on Alaska’s marine ecosystems, including changes to the distribution and abundance of marine species.
Glaciers are also being impacted by climate change, with a 20% decline in glacier size in Alaska between 1980 and 2010 (6). This is resulting in changes to water levels and water quality, as well as increased risk of floods and landslides.
Consequences for Ecosystems and Communities
The impacts of climate change on Alaska’s permafrost, sea ice, and glaciers are having far-reaching consequences for ecosystems and communities. Warmer temperatures and more precipitation are altering the distribution and abundance of marine species, leading to changes in food webs and ecosystems.
Communities are also being impacted by climate change, with warmer temperatures and more precipitation leading to infrastructure damage and increased risk of landslides and floods. Climate change is also having significant impacts on Alaska’s indigenous communities, including changes to traditional hunting and gathering practices, and increased risk of heat-related illnesses.
Last Point
The weather in Alaska in December is a complex and dynamic phenomenon, influenced by a range of atmospheric and geographical factors. Despite the challenges it poses, the harsh winter weather in Alaska also presents opportunities for adventure and exploration, from dog sledding and skiing to aurora-watching and Northern Lights photography.
As we conclude our journey into the world of weather in Alaska in December, we are reminded of the importance of understanding and respecting this unforgiving environment. Whether you’re a seasoned explorer or a curious observer, Alaska’s winter wonderland is a place of breathtaking beauty and awe-inspiring power.
Popular Questions
What is the average temperature in Alaska in December?
The average temperature in Alaska in December ranges from -10 to -20 degrees Fahrenheit (-23 to -29 degrees Celsius) in the south and -30 to -50 degrees Fahrenheit (-34 to -45 degrees Celsius) in the north.
How much precipitation can Alaska expect in December?
Alaska receives an average of 1-3 inches (2.5-7.6 cm) of precipitation in December, with most of it falling in the form of snow in the interior and western regions.
What are the most extreme weather events that occur in Alaska in December?
The most extreme weather events that occur in Alaska in December include blizzards, temperatures as low as -50 degrees Fahrenheit (-45.6 degrees Celsius), and winds that can reach speeds of 100-120 mph (160-193 kph).
How does climate change affect the weather in Alaska in December?
Climate change is expected to lead to increased temperature and precipitation variability in Alaska, with warmer temperatures and more frequent extreme weather events, such as heatwaves and heavy precipitation events.
What are some tips for travelers visiting Alaska in December?
Some tips for travelers visiting Alaska in December include dressing in layers, bringing warm clothing and gear, and being prepared for extreme weather conditions, such as blizzards and subfreezing temperatures.
