Large-Scale Mode Impacts on the Sea Level over the Red Sea and Gulf of Aden

Falling between seasonal cycle variability and the impact of local drivers, the sea level in the Red Sea and Gulf of Aden has been given less consideration, especially with large-scale modes. With multiple decades of satellite altimetry observations combined with good spatial resolution, the time has come for diagnosis of the impact of large-scale modes on the sea level in those important semi-enclosed basins. While the annual cycle of sea level appeared as a dominant cycle using spectral analysis, the semi-annual one was also found, although much weaker. The first empirical orthogonal function mode explained, on average, about 65 of the total variance throughout the seasons, while their principal components clearly captured the strong La Nina event (1999–2001) in all seasons. The sea level showed a strong positive relation with positive phase El Nino Southern Oscillation in all seasons and a strong negative relation with East Atlantic/West Russia during winter and spring over the study period (1993–2017). We show that the unusually stronger easterly winds that are displaced north of the equator generate an upwelling area near the Sumatra coast and they drive both warm surface and deep-water masses toward the West Indian Ocean and Arabian Sea, rising sea level over the Red Sea and Gulf of Aden. This process could explain the increase of sea level in the basin during the positive phase of El Nino Southern Oscillation events.

[1]  D. Chambers,et al.  Anomalous warming in the Indian Ocean coincident with El Niño , 1999 .

[2]  M. Ionita,et al.  Distinct modes of East Asian Winter Monsoon documented by a southern Red Sea coral record , 2014 .

[3]  W. Johns,et al.  Wind induced sea level variability in the Red Sea , 2001 .

[4]  Y. Loya,et al.  A coral oxygen isotope record from the northern Red Sea documenting NAO, ENSO, and North Pacific teleconnections on Middle East climate variability since the year 1750 , 2000 .

[5]  S. Al-Moghrabi,et al.  Environmental and biological effects on the stable oxygen isotope records of corals in the northern Gulf of Aqaba, Red Sea , 2002 .

[6]  Yan Du,et al.  Role of Air-Sea Interaction in the Long Persistence of El Nino-Induced North Indian Ocean Warming* , 2009 .

[7]  Bin Wang,et al.  Why the properties of El Niño changed during the late 1970s , 2001 .

[8]  A. Timmermann,et al.  Increasing frequency of extreme El Niño events due to greenhouse warming , 2014 .

[9]  D. Stammer,et al.  Coastal sea level changes, observed and projected during the 20th and 21st century , 2015, Climatic Change.

[10]  O. Maury,et al.  Indian Ocean Dipole and El Niño/Southern Oscillation impacts on regional chlorophyll anomalies in the Indian Ocean , 2013 .

[11]  N. White,et al.  Sea-Level Rise from the Late 19th to the Early 21st Century , 2011 .

[12]  S. Xie,et al.  Structure and Mechanisms of South Indian Ocean Climate Variability , 2002 .

[13]  F. Al-Horani,et al.  Seasonal variations in the stable oxygen isotopic composition in Porites corals from the northern Gulf of Aqaba, Red Sea , 2007 .

[14]  Y. Song,et al.  PDO and ENSO modulations intensified decadal sea level variability in the tropical Pacific , 2015 .

[15]  R. Nayak,et al.  Sea Surface Height Variability in the Tropical Indian Ocean: Steric Contribution , 2012, Journal of the Indian Society of Remote Sensing.

[16]  Michael N. Tsimplis,et al.  Mechanisms of decadal sea level variability in the eastern North Atlantic and the Mediterranean Sea , 2012 .

[17]  T. Yamagata,et al.  Mode shift in the Indian Ocean climate under global warming stress , 2009 .

[18]  Ngar-Cheung Lau,et al.  Remote Sea Surface Temperature Variations during ENSO: Evidence for a Tropical Atmospheric Bridge , 1999 .

[19]  K. Lau,et al.  The Asian monsoon and predictability of the tropical ocean–atmosphere system , 1996 .

[20]  John R. Lanzante,et al.  The Atmospheric Bridge: The Influence of ENSO Teleconnections on Air-Sea Interaction over the Global Oceans , 2002 .

[21]  P. Müller,et al.  Mediterranean Moisture Source for an Early-Holocene Humid Period in the Northern Red Sea , 2003, Science.

[22]  Lin Feng,et al.  Why Was the Indian Ocean Dipole Weak in the Context of the Extreme El Niño in 2015 , 2017 .

[23]  S. Al-Moghrabi,et al.  Stable oxygen isotopes in Porites corals monitor weekly temperature variations in the northern Gulf of Aqaba, Red Sea , 2003, Coral Reefs.

[24]  R. Manasrah,et al.  Spatial and seasonal variations of sea level in the Red Sea, 1958–2001 , 2009 .

[25]  M. Alsaafani,et al.  Signatures of Tropical climate modes on the Red Sea and Gulf of Aden Sea Level , 2017 .

[26]  A. Rubino,et al.  Teleconnections force interannual-to-decadal tidal variability in the Lagoon of Venice (northern Adriatic) , 2009 .

[27]  N. Saji,et al.  Structure of SST and Surface Wind Variability during Indian Ocean Dipole Mode Events: COADS Observations* , 2003 .

[28]  P. Delecluse,et al.  Sea surface temperature associations with the late Indian summer monsoon , 2003 .

[29]  W. Patzert.  Wind-induced reversal in Red Sea circulation☆ , 1974 .

[30]  J. Thepaut,et al.  The ERA‐Interim reanalysis: configuration and performance of the data assimilation system , 2011 .

[31]  M. Lengaigne,et al.  Supporting Information for Robustness of observation-based decadal sea-level variability in the Indo-Pacific Ocean , 2017 .

[32]  Jianping Li,et al.  Interdecadal shift in the relationship between the East Asian summer monsoon and the tropical Indian Ocean , 2010 .

[33]  P. Terray,et al.  Indian Ocean Sea Surface Temperature and El Niño–Southern Oscillation: A New Perspective , 2005 .

[34]  S. Sultan,et al.  Relative Contribution of External Sources of Mean Sea-level Variations at Port Sudan, Red Sea , 1996 .

[35]  Michele M. Rienecker,et al.  Mechanisms for the Indian Ocean warming during the 1997–98 El Niño , 1999 .

[36]  I. Hoteit,et al.  Atmospheric forcing of the winter air–sea heat fluxes over the Northern Red Sea , 2013 .

[37]  W. Hazeleger,et al.  Climate scenarios of sea level rise for the northeast Atlantic Ocean: a study including the effects of ocean dynamics and gravity changes induced by ice melt , 2008 .

[38]  Anny Cazenave,et al.  Causes for contemporary regional sea level changes. , 2013, Annual review of marine science.

[39]  K. Arpe,et al.  Connection between Caspian sea level variability and ENSO , 2000 .

[40]  B. Jones,et al.  The Interannual Variability of Sea Surface Temperature in the Red Sea From 35 Years of Satellite and In Situ Observations , 2018, Journal of Geophysical Research: Oceans.

[41]  Lei Fan,et al.  Indian Ocean Dipole Modes Associated with Different Types of ENSO Development , 2017 .

[42]  S. Shenoi,et al.  Water masses in the Gulf of Aden , 2007 .

[43]  Yves M. Tourre,et al.  ENSO Signals in Global Upper-Ocean Temperature , 1995 .

[44]  S. Levitus,et al.  Thermosteric sea level rise, 1955–2003 , 2005 .

[45]  S. Sultan,et al.  Seasonal variations of the sea level in the central part of the Red Sea , 1995 .

[46]  P. R. Shanas,et al.  Climate driven variability of wind-waves in the Red Sea , 2017 .

[47]  William E. Johns,et al.  An Oceanic General Circulation Model (OGCM) investigation of the Red Sea circulation: 2. Three‐dimensional circulation in the Red Sea , 2003 .

[48]  Coastal sea level and the large-scale climate state A downscaling exercise for the Japanese Islands , 1995 .

[49]  Wen Zhou,et al.  Three Eurasian teleconnection patterns: spatial structures, temporal variability, and associated winter climate anomalies , 2014, Climate Dynamics.

[50]  A. Cherchi,et al.  ENSO and the recent warming of the Indian Ocean , 2018 .

[51]  I. Hoteit,et al.  Impacts of Climate Modes on Air–Sea Heat Exchange in the Red Sea , 2015 .

[52]  Emil V. Stanev,et al.  Regional sea level response to global climatic change: Black Sea examples , 2001 .

[53]  J. Minx,et al.  Climate Change 2014 : Synthesis Report , 2014 .

[54]  H. Bj ornsson,et al.  A Manual for EOF and SVDanalyses of Climati Data , 2007 .

[55]  G. Lohmann,et al.  Arctic Oscillation signature in a Red Sea coral , 2001 .

[56]  S. A. Morcos,et al.  Physical and chemical oceanography of the Red Sea , 1970 .

[57]  S. Xie,et al.  Tropical indian ocean variability in the IPCC twentieth-century climate simulations , 2006 .

[58]  D. Chambers,et al.  The effect of the NAO on sea level and on mass changes in the Mediterranean Sea , 2013 .

[59]  Peter J. Webster,et al.  Monsoon and Enso: Selectively Interactive Systems , 1992 .

[60]  C. Piecuch,et al.  El Niño, La Niña, and the global sea level budget , 2016 .

[61]  kwang-yul kim,et al.  An ongoing shift in Pacific Ocean sea level , 2016 .

[62]  J. Marotzke,et al.  El Niño–Southern Oscillation signals in sea level, surface mass redistribution, and degree‐two geoid coefficients , 2008 .

[63]  Gary T. Mitchum,et al.  Variations in global mean sea level associated with the 1997–1998 ENSO event: Implications for measuring long term sea level change , 1999 .

[64]  S. Sultan,et al.  Sea level changes in the central part of the Red Sea , 2003 .

[65]  Ibrahim Hoteit,et al.  Monsoon oscillations regulate fertility of the Red Sea , 2015 .

[66]  N. White,et al.  A 20th century acceleration in global sea‐level rise , 2006 .