On the time variability of the net ocean-to-atmosphere heat flux in midlatitudes, with application to the North Atlantic basin

2003 ◽  
Vol 129 (594) ◽  
pp. 2867-2878 ◽  
Author(s):  
Arnaud Czaja
Keyword(s):  
Heat Flux ◽  
North Atlantic ◽  
Time Variability ◽  
Atlantic Basin ◽  
North Atlantic Basin ◽  
The North ◽  
The North Atlantic

Seasonal Analysis of Air-Sea CO2 Flux Variability in the North Atlantic and the Southern Ocean 

2021 ◽  
Author(s):  
Paridhi Rustogi ◽  
Peter Landschuetzer ◽  
Sebastian Brune ◽  
Johanna Baehr
Keyword(s):  
Southern Ocean ◽  
Observational Data ◽  
North Atlantic ◽  
Seasonal Variability ◽  
Max Planck ◽  
Regional Patterns ◽  
Atlantic Basin ◽  
North Atlantic Basin ◽  
The North ◽  
The North Atlantic

<p>Understanding the variability and drivers of air-sea CO<span><sub>2</sub></span> fluxes on seasonal timescales is critical for resolving the ocean carbon sink's evolution and variability. Here, we investigate whether discrepancies in the representation of air-sea CO<span><sub>2</sub></span> fluxes on a seasonal timescale accumulate to influence the representation of CO<span><sub>2</sub></span> fluxes on an interannual timescale in two important ocean CO<span><sub>2 </sub></span>sink regions – the North Atlantic basin and the Southern Ocean. Using an observation-based product (SOM-FFN) as a reference, we investigate the representation of air-sea CO<span><sub>2</sub></span> fluxes in the Max Planck Institute's Earth System Model Grand Ensemble (MPI-ESM GE). Additionally, we include a simulation based on the same model configuration, where observational data from the atmosphere and ocean components is assimilated (EnKF assimilation) to verify if the inclusion of observational data alters the model state significantly and if the updated modelled CO<span><sub>2 </sub></span>flux values better represent observations.</p><p>We find agreement between all three observation-based and model products on an interannual timescale for the North Atlantic basin. However, the agreement on a seasonal timescale is inconsistent with discrepancies as large as 0.26 PgC/yr in boreal autumn in the North Atlantic. In the Southern Ocean, we find little agreement between the three products on an interannual basis with significant seasonal discrepancies as large as 1.71 PgC/yr in austral winter. However, while we identify regional patterns of dominating seasonal variability in MPI-GE and EnKF, we find that the SOM-FFN cannot demonstrate robust conclusions on the relevance of seasonal variability in the Southern Ocean. In turn, we cannot pin down the problems for this region.</p>

I.—On the Eastern Margin of the North Atlantic Basin

1899 ◽  
Vol 6 (3) ◽  
pp. 97-105 ◽  
Author(s):  
Wilfrid H. Hudleston
Keyword(s):  
North Atlantic ◽  
Physical Geography ◽  
Point Of View ◽  
Atlantic Basin ◽  
Eastern Margin ◽  
North Atlantic Basin ◽  
The North ◽  
The North Atlantic

In offering a few remarks on a subject which belongs, in the first instance, to the province of physical geography, it will be necessary forme to point out certain hydrographical details, whilst, endeavouring to deduce from these details conclusions having a geological bearing. Oceanography is almost a science in itself, especially if we regard it from a geological point of view, as something more than a mere description of water-spaces and soundings. Ever since the days when the deep oceans were first explored for the purpose of laying the telegraph cables some of the leading facts were made known, and have since become familiar to all students of physical geography.

scholarly journals Persistent Atmospheric and Oceanic Anomalies in the North Atlantic from Summer 2009 to Summer 2010

2011 ◽  
Vol 24 (22) ◽  
pp. 5812-5830 ◽  
Author(s):  
Zeng-Zhen Hu ◽  
Arun Kumar ◽  
Bohua Huang ◽  
Yan Xue ◽  
Wanqiu Wang ◽  
...  
Keyword(s):  
Heat Flux ◽  
Atlantic Ocean ◽  
North Atlantic ◽  
Negative Phase ◽  
Atlantic Basin ◽  
Term Trend ◽  
The North ◽  
The North Atlantic ◽  
Long Term Trend

Abstract In this work, the authors analyze the air–sea interaction processes associated with the persistent atmospheric and oceanic anomalies in the North Atlantic Ocean during summer 2009–summer 2010 with a record-breaking positive sea surface temperature anomaly (SSTA) in the hurricane Main Development Region (MDR) in the spring and summer of 2010. Contributions to the anomalies from the El Niño–Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO), and a long-term trend are identified. The warming in the tropical North Atlantic during summer 2009–summer 2010 represented a typical response to ENSO, preconditioned and amplified by the influence of a strong and persistent negative phase of the NAO. The long-term trends enhanced the warming in the high and low latitudes and weakened the cooling in the midlatitudes. The persistent negative phase of the NAO was associated with active thermodynamic air–sea interaction in the North Atlantic basin. Surface wind anomalies associated with the NAO altered the ocean surface heat flux and changed the SSTA, which was likely further enhanced by the positive wind speed–evaporation–SST feedback. The total heat flux was dominated by the latent and sensible heat fluxes, while the shortwave radiation contributed to the tropical SSTA to a lesser degree. Sensitivity experiments with an atmospheric general circulation model forced by observed SST in the Atlantic Ocean alone suggested that the Atlantic SSTA, which was partly forced by the NAO, had some positive contribution to the persistence of the negative phase of the NAO. Therefore, the persistent NAO condition is partly an outcome of the global climate anomalies and the ocean–atmosphere feedback within the Atlantic basin. The combination of the ENSO, NAO, and long-term trend resulted in the record-breaking positive SSTA in the MDR in the boreal spring and summer of 2010. On the basis of the statistical relationship, the SSTA pattern in the North Atlantic was reasonably well predicted by using the preceding ENSO and NAO as predictors.

scholarly journals VI.—Mr. Hudleston “On the Eastern Margin of the North Atlantic Basin.”

1899 ◽  
Vol 6 (12) ◽  
pp. 559-566
Author(s):  
J. W. Spencer
Keyword(s):  
Current Literature ◽  
North Atlantic ◽  
Atlantic Basin ◽  
Eastern Margin ◽  
North Atlantic Basin ◽  
The North ◽  
The North Atlantic ◽  
Distant Region

The delay of several months, in replying to Mr. Hudleston's communication relative to the above-named subject, has been due to absence in the field in a distant region, where I was not in touch with the current literature.

scholarly journals Far-Field Tsunami Impact in the North Atlantic Basin from Large Scale Flank Collapses of the Cumbre Vieja Volcano, La Palma

2015 ◽  
Vol 172 (12) ◽  
pp. 3589-3616 ◽  
Author(s):  
Babak Tehranirad ◽  
Jeffrey C. Harris ◽  
Annette R. Grilli ◽  
Stephan T. Grilli ◽  
Stéphane Abadie ◽  
...  
Keyword(s):  
North Atlantic ◽  
Large Scale ◽  
Far Field ◽  
Atlantic Basin ◽  
North Atlantic Basin ◽  
The North ◽  
La Palma ◽  
The North Atlantic ◽  
Cumbre Vieja

scholarly journals Tornado outbreaks associated with landfalling hurricanes in the North Atlantic Basin: 1954–2004

2007 ◽  
Vol 97 (1-4) ◽  
pp. 255-271 ◽  
Author(s):  
S. M. Verbout ◽  
D. M. Schultz ◽  
L. M. Leslie ◽  
H. E. Brooks ◽  
D. J. Karoly ◽  
...  
Keyword(s):  
North Atlantic ◽  
Atlantic Basin ◽  
North Atlantic Basin ◽  
The North ◽  
The North Atlantic ◽  
Tornado Outbreaks

scholarly journals Modeling the Nd isotopic composition in the North Atlantic basin using an eddy-permitting model

Ocean Science ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 789-797 ◽  
Author(s):  
T. Arsouze ◽  
A. M. Treguier ◽  
S. Peronne ◽  
J.-C. Dutay ◽  
F. Lacan ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
North Atlantic ◽  
Continental Margins ◽  
Atlantic Basin ◽  
Exchange Time ◽  
North Atlantic Basin ◽  
The North ◽  
Geographical Variations ◽  
The North Atlantic ◽  
Nd Isotopic Composition

Abstract. Boundary Exchange (BE – exchange of elements between continental margins and the open ocean) has been emphasized as a key process in the oceanic cycle of neodymium (Nd) (Lacan and Jeandel, 2005a). Here, we use a regional eddy-permitting resolution Ocean General Circulation Model (1/4°) of the North Atlantic basin to simulate the distribution of the Nd isotopic composition, considering BE as the only source. Results show good agreement with the data, confirming previous results obtained using the same parameterization of the source in a coarse resolution global model (Arsouze et al., 2007), and therefore the major control played by the BE processes in the Nd cycle on the regional scale. We quantified the exchange rate of the BE, and found that the time needed for the continental margins to significantly imprint the chemical composition of the surrounding seawater (further referred as characteristic exchange time) is of the order of 0.2 years. However, the timescale of the BE may be subject to large variations as a very short exchange time (a few days) is needed to reproduce the highly negative values of surface waters in the Labrador Sea, whereas a longer one (up to 0.5 years) is required to simulate the radiogenic influence of basaltic margins and distinguish the negative isotopic signatures of North Atlantic Deep Water from the more radiogenic southern origin water masses. This likely represents geographical variations in erosion fluxes and the subsequent particle load onto the continental margins. Although the parameterization of the BE is the same in both configurations of the model, the characteristic exchange time in the eddy-permitting configuration is significantly lower than the previous evaluations using a low resolution configuration (6 months to 10 years), but however in agreement with the available seawater Nd isotope data. This results highlights the importance of the model dynamics in simulating the BE process.

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