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Midlatitude Marine Heatwaves: Forcing and Impacts

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Last updated:
8 February 2018
*This is a Joint Special Collection* 
The following journals are accepting submissions: Geophysical Research Letters, JGR Oceans, JGR Biogeosciences, and JGR Atmospheres.

Persistent, midlatitude marine heatwaves (MHWs), such as the 2013-2014 extreme warming of the Northeastern Pacific (aka “the Blob”), can have dramatic and widespread impacts on ecosystems, fisheries and weather. MHWs have been observed in both hemispheres (e.g., the Ningaloo Niño in Western Australia), including in semi-enclosed basins such as the Mediterranean Sea. MHWs can be caused by a combination of atmospheric and oceanographic processes. It is also expected that they will become more frequent and intense under anthropogenic climate change. This Special Collection welcomes papers investigating the causes, evolution, and impacts of persistent midlatitude MHWs.

Thermohaline Circulation Variability in the Subpolar North Atlantic

1 November 2006

Climatic Impacts of Indian Ocean Dipoles, El Niño Southern Oscillation, and Their Interaction With the Monsoon Systems in the Asia-Oceania Region

1 July 2008
A. Mueller
The El Nino-Southern Oscillation (ENSO) variability in the Pacific is known to contribute to extreme weathers and abnormal climate conditions around the world. Recent studies have also identified such climate impacts associated with the Indian Ocean Dipole (IOD), as confirmed by the recent events of 2006 and 2007. This special section provided us with an opportunity to present some of those scientific issues and to promote interests in the emerging research fronts of the Indo-Pacific climate variations. Included articles will offer new ways to understand mechanisms of ENSO, IOD and monsoon including their predictions.

Seismic Oceanography: A New Tool to Understand the Ocean Structure

1 August 2009
V. Sallares
The understanding of ocean mixing processes is one of the most challenging tasks posed to physical oceanographers. Mixing processes have small spatial scales in nature, and conventional measurement techniques fail to provide sufficient information to improve knowledge. Multichannel seicmics (MCS), a widely used method in Seismology, was recently shown to be well-adapted to study such processes, since it allows mapping acoustic reflectivity deriving from ocean fine-structure at extraordinarily high lateral resolution. Seismic Oceanography is emerging as a challenging interdisciplinary field that bridges the gap between Physical Oceanography and Seismology. This special section aims at providing a comprehensive view of the state of the art of the topic, and at showing examples of oceanic features and processes that can be better understood with the help of MCS, based mainly on the works presented in the recent 1st ESF Exploratory Workshop on Seismic Oceanography (www.cmima.csic.es/sow).

Enhanced Sub-Artic Influence on the California Current 2002

1 August 2003
This special section discusses a rare phenomenon: strong enhancement of Subarctic influence in the California Current system in the summer of 2002. This cold, fresh anomaly in the upper halocline was more extreme than any prior observation, though historical records extend back for several decades

Results of the Meteor 55: Tropical SOLAS Expedition

14 December 2004
D. Wallace
This special section presents results from an interdisciplinary research cruise to the northern tropical Atlantic Ocean

New Understanding of the Arabian Sea Circulation

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Last updated:
8 December 2017
This special collection welcomes new insights into the physical and biogeochemical features of the circulation within the Arabian Sea, its connection to local and remote  forcing, air-sea interaction and feedback processes.

Submission deadline: December 31, 2018

Measurements and Monitoring at the TAG Hydrothermal Field, Mid-Atlantic Ridge 26°N, 45°W

1 January 1996
The international oceanographic community carried out a coordinated series of cooperative cruises and dives with Japanese, Russian and U.S. submersibles between 1993 and 1995 to perform baseline measurements and to establish a seafloor observatory to monitor the active sulfide mound in the Trans-Atlantic Geotraverse (TAG) hydrothermal field before, during and after drilling by Ocean Drilling Program Leg 158 in October–November 1994. The results of that effort and related work are reported herein as group of 23 papers comprising a special section in this issue of Geophysical Research Letters.


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Featured Special Collection

A Census of Atmospheric Variability from Seconds to Decades 

The atmosphere varies naturally on all length scales from millimeters to thousands of kilometers, and on all time scales from seconds to decades and longer.  This special collection of Geophysical Research Letters synthesizes and summarizes that variability through a phenomenological census.  The collection brings together some of the most influential and definitive papers to have been published in this journal in recent years.  The topics covered include turbulence on time scales of seconds and minutes, gravity waves on time scales of hours, weather systems on time scales of days, atmospheric blocking on time scales of weeks, the Madden–Julian Oscillation on time scales of months, the Quasi-Biennial Oscillation and El Niño–Southern Oscillation on time scales of years, and the North Atlantic, Arctic, Antarctic, Pacific Decadal, and Atlantic Multi-decadal Oscillations on time scales of decades.  The collection is accompanied by a Commentary article, which provides an authoritative, concise, and accessible point of reference for the most important modes of atmospheric variability.

A Census of Atmospheric Variability from Seconds to Decades