East Greenland Current

East Greenland Current
Name	East Greenland Current
Location	Arctic Ocean, Greenland Sea, Iceland Sea
Direction	southward

East Greenland Current. The East Greenland Current is a significant ocean current that plays a crucial role in the Arctic Ocean's circulation system, interacting with the West Greenland Current and the Labrador Current. It is influenced by the Thermohaline circulation and the North Atlantic Meridional Overturning Circulation, which are driven by changes in temperature and salinity in the North Atlantic Ocean, particularly near Iceland and the Faroe Islands. The current's dynamics are also connected to the Gulf Stream and the Kuroshio Current, which are major contributors to the global ocean circulation.

Introduction

The East Greenland Current originates from the Arctic Ocean and flows southward along the eastern coast of Greenland, passing through the Denmark Strait and into the Iceland Sea. This current is characterized by its cold and relatively fresh waters, which are influenced by the melting of sea ice and the input of freshwater from glaciers such as the Ilulissat Icefjord and the Sermeq Kujalleq glacier. The current's properties are also shaped by the atmospheric circulation patterns, including the North Atlantic Oscillation and the Arctic Oscillation, which affect the wind patterns and ocean-atmosphere interactions in the region. The East Greenland Current is closely monitored by organizations such as the National Oceanic and Atmospheric Administration (NOAA) and the Intergovernmental Oceanographic Commission (IOC) of the United Nations Educational, Scientific and Cultural Organization (UNESCO).

Geography and Path

The East Greenland Current flows through the Greenland Sea and the Iceland Sea, which are characterized by complex bathymetry and ocean ridges, such as the Mid-Atlantic Ridge and the Reykjanes Ridge. The current's path is influenced by the coastal geometry and the island arcs, including the Faroe Islands and the Icelandic shelf. The current interacts with other ocean currents, such as the Norwegian Current and the Irminger Current, which are driven by the thermohaline circulation and the wind-driven circulation. The East Greenland Current also plays a role in the regional climate of Iceland and Greenland, which is characterized by cold temperatures and high precipitation rates, particularly in the Vatnajökull National Park and the Ilulissat Icefjord.

Oceanographic Characteristics

The East Greenland Current is characterized by its cold and relatively fresh waters, with temperatures ranging from -1.8°C to 0°C and salinity levels between 32 and 34 practical salinity units (psu). The current's properties are influenced by the melting of sea ice and the input of freshwater from glaciers and rivers, such as the Jakobshavn Isbræ and the Kangerlussuaq Fjord. The current's velocity is relatively slow, ranging from 0.1 to 0.5 meters per second (m/s), and its transport is estimated to be around 1-2 Sverdrups (Sv). The East Greenland Current is also characterized by its high nutrient levels, particularly nitrate and phosphate, which support the growth of phytoplankton and zooplankton in the region.

Role in Climate Regulation

The East Greenland Current plays a crucial role in the regional climate of the North Atlantic Ocean, particularly in the Arctic and sub-Arctic regions. The current's cold and fresh waters help to regulate the thermohaline circulation and the North Atlantic Meridional Overturning Circulation, which are essential for the global climate system. The current also influences the atmospheric circulation patterns, including the North Atlantic Oscillation and the Arctic Oscillation, which affect the wind patterns and ocean-atmosphere interactions in the region. The East Greenland Current is closely monitored by organizations such as the Intergovernmental Panel on Climate Change (IPCC) and the National Center for Atmospheric Research (NCAR) to better understand its role in the global climate system.

Impact on Marine Ecosystems

The East Greenland Current has a significant impact on the marine ecosystems of the North Atlantic Ocean, particularly in the Arctic and sub-Arctic regions. The current's cold and nutrient-rich waters support the growth of phytoplankton and zooplankton, which are the base of the marine food web. The current also influences the distribution and abundance of marine species, such as cod, haddock, and capelin, which are commercially important for the fishing industry in Iceland and Greenland. The East Greenland Current is also home to a variety of marine mammals, including humpback whales, minke whales, and seals, which are protected by organizations such as the International Whaling Commission (IWC) and the North Atlantic Marine Mammal Commission (NAMMCO).

Research and Exploration

The East Greenland Current has been the subject of extensive research and exploration, particularly in the fields of oceanography and climate science. The current has been studied by organizations such as the National Oceanic and Atmospheric Administration (NOAA), the European Space Agency (ESA), and the Alfred Wegener Institute for Polar and Marine Research (AWI). The current has also been explored by research vessels, such as the R/V Knorr and the R/V Polarstern, which have conducted oceanographic surveys and climate monitoring in the region. The East Greenland Current is also an important area of study for universities and research institutions, such as the University of Copenhagen and the University of Iceland, which have conducted research on the current's dynamics and its impact on the regional climate and marine ecosystems.

Category:Ocean currents