scholarly journals Increasing the Resolution of Ocean pCO2 Maps in the South Eastern Atlantic Ocean Merging Multifractal Satellite-Derived Ocean Variables

2018 ◽  
Vol 56 (11) ◽  
pp. 6596-6610 ◽  
Author(s):  
Ismael Hernandez-Carrasco ◽  
Veronique Garcon ◽  
Joel Sudre ◽  
Christoph Garbe ◽  
Hussein Yahia
Keyword(s):  
Atlantic Ocean ◽  
The South ◽  
South Eastern ◽  
Eastern Atlantic Ocean

scholarly journals Two decades observing smoke above clouds in the south-eastern Atlantic Ocean: Deep Blue algorithm updates and validation with ORACLES field campaign data

2019 ◽  
Vol 12 (7) ◽  
pp. 3595-3627 ◽  
Author(s):  
Andrew M. Sayer ◽  
N. Christina Hsu ◽  
Jaehwa Lee ◽  
Woogyung V. Kim ◽  
Sharon Burton ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Optical Depth ◽  
Data Sets ◽  
The South ◽  
Validation Data ◽  
Field Campaign ◽  
Airborne Measurements ◽  
South Eastern ◽  
Eastern Atlantic Ocean ◽  
Uncertainty Estimates

Abstract. This study presents and evaluates an updated algorithm for quantification of absorbing aerosols above clouds (AACs) from passive satellite measurements. The focus is biomass burning in the south-eastern Atlantic Ocean during the 2016 and 2017 ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) field campaign deployments. The algorithm retrieves the above-cloud aerosol optical depth (AOD) and underlying liquid cloud optical depth and is applied to measurements from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), Moderate Resolution Imaging Spectroradiometer (MODIS), and Visible Infrared Imaging Radiometer Suite (VIIRS) from 1997 to 2017. Airborne NASA Ames Spectrometers for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR) and NASA Langley High Spectral Resolution Lidar 2 (HSRL2) data collected during ORACLES provide important validation for spectral AOD for MODIS and VIIRS; as the SeaWiFS mission ended in 2010, it cannot be evaluated directly. The 4STAR and HSRL2 comparisons are complementary and reveal performance generally in line with uncertainty estimates provided by the optimal estimation retrieval framework used. At present the two MODIS-based data records seem the most reliable, although there are differences between the deployments, which may indicate that the available data are not yet sufficient to provide a robust regional validation. Spatiotemporal patterns in the data sets are similar, and the time series are very strongly correlated with each other (correlation coefficients from 0.95 to 0.99). Offsets between the satellite data sets are thought to be chiefly due to differences in absolute calibration between the sensors. The available validation data for this type of algorithm are limited to a small number of field campaigns, and it is strongly recommended that such airborne measurements continue to be made, both over the southern Atlantic Ocean and elsewhere.

Transport of North Pacific 137Cs labeled waters to the south-eastern Atlantic Ocean

2011 ◽  
Vol 89 (1-4) ◽  
pp. 31-37 ◽  
Author(s):  
J.A. Sanchez-Cabeza ◽  
I. Levy ◽  
J. Gastaud ◽  
M. Eriksson ◽  
I. Osvath ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Pacific ◽  
The South ◽  
South Eastern ◽  
Eastern Atlantic Ocean

scholarly journals Two decades observing smoke above clouds in the south-eastern Atlantic Ocean: Deep Blue algorithm updates and validation with ORACLES field campaign data

2019 ◽  
Author(s):  
Andrew M. Sayer ◽  
N. Christina Hsu ◽  
Jaehwa Lee ◽  
Woogyung V. Kim ◽  
Sharon Burton ◽  
...  
Keyword(s):  
Time Series ◽  
Atlantic Ocean ◽  
Optical Depth ◽  
High Spectral Resolution ◽  
Absolute Calibration ◽  
Strongly Correlated ◽  
The South ◽  
Field Campaign ◽  
South Eastern ◽  
Eastern Atlantic Ocean

Abstract. This study presents and evaluates an updated algorithm for quantification of absorbing aerosols above clouds (AACs) from passive satellite measurements. The focus is biomass burning in the south-eastern Atlantic Ocean during the 2016 and 2017 ObserRvations of Aerosols above CLouds and their interactionS (ORACLES) field campaign deployments. The algorithm retrieves the above-cloud aerosol optical depth (AOD) and underlying liquid cloud optical depth, and is intended to be applied to measurements from sensors including the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), Moderate Resolution Imaging Spectroradiometers (MODIS), and Visible Infrared Imaging Radiometer Suite (VIIRS). Together, these sensors provide around twenty years of observations to date. Airborne NASA Ames Spectrometers for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR) and NASA Langley High Spectral Resolution Lidar 2 (HSRL2) data collected during ORACLES provide important validation for spectral AOD for MODIS and VIIRS; as the SeaWiFS mission ended in 2010, it cannot be evaluated directly. These 4STAR and HSRL2 comparisons are complimentary and reveal performance generally in line with theoretical expectations. At present the two MODIS-based data records seem the most reliable, although there are differences between the deployments. Data collected in the region from other sources are also used to evaluate some assumptions made in the AAC retrieval. Spatiotemporal patterns in the data sets are very similar, and the time series themselves are very strongly correlated with each other (correlation coefficients from 0.95–0.99). Offsets between the time series are thought to be linked to differences in absolute calibration between the sensors, which can also explain some of the differences in validation results. The time series are also strongly correlated (correlations 0.78-0.94) with quantities such as ultraviolet aerosol index, total column AOD from standard MODIS aerosol products, and active fire detections. This suggests that these quantities may also act as proxies for the above-cloud aerosol load in this region, when AAC retrievals are unavailable.

Crinoidea and Holothuroidea (Echinodermata) of the abyssal Angola Basin—Results of the DIVA-1 expedition of FS "Meteor" (Cruise M48/1)

Zootaxa ◽  
2006 ◽  
Vol 1276 (1) ◽  
pp. 1 ◽  
Author(s):  
JENS MICHAEL BOHN
Keyword(s):  
Atlantic Ocean ◽  
Rich Variety ◽  
South Eastern ◽  
Epibenthic Sledge ◽  
Eastern Atlantic Ocean ◽  
Agassiz Trawl

Agassiz trawl and epibenthic sledge samples taken at abyssal depths in the Angola Basin (south-eastern Atlantic Ocean) during the expedition DIVA-1 with FS "Meteor" in July 2000 yielded a rich variety of Echinodermata: inter alia one stalked crinoid (Bathycrinus cf. aldrichianus Wyville Thomson, 1876) and altogether nine holothurian species, two of which are subspecies. One of these, Achlyonice longicornis spec. nov., is new to science, while all others have been described earlier: Deima validum validum Théel, 1879, Psychropotes semperiana Théel, 1882, Peniagone purpurea (Théel, 1882), Molpadiodemas atlanticus (R. Perrier, 1898), Molpadia liska Pawson, 1977, Protankyra brychia (Verrill, 1885), Siniotrochus myriodontus Gage & Billett, 1986 and Neolepidotrochus parvidiscus angolensis Bohn, 2005. All species collected are described and their known distributions are given. Finally, two crinoids and 21 holothurian species, so far known from the abyssal Angola Basin, are listed and their zoogeographical relationships are discussed.

Southern right whales in the South-western Atlantic Ocean: proposed criteria to identify suitable areas of use in poorly known reproductive grounds

2019 ◽  
Vol 99 (5) ◽  
pp. 1231-1236
Author(s):  
Giovanna Corrêa e Figueiredo ◽  
Samara Cazzoli y Goya ◽  
Marcos César de Oliveira Santos
Keyword(s):  
Atlantic Ocean ◽  
Eastern Coast ◽  
The South ◽  
Sandy Bottom ◽  
Western Atlantic ◽  
South Eastern ◽  
Western Atlantic Ocean ◽  
Right Whale ◽  
Ranking Criteria ◽  
Right Whales

AbstractUrbanization and intense vessel traffic in coastal areas are obstacles for right whales when selecting breeding and calving grounds. Human activities might be the main cause for the recently observed drop in right whale sightings along the south-eastern coast of Brazil. Information concerning the biology and the activities that can potentially affect the presence of individuals along the coast are essential for management purposes, as well as for the recovery of the species stocks after a period of whaling pressure. This study correlated the occurrence of right whales in the northern limit of the breeding ground in the South-western Atlantic Ocean with local geomorphology, degree of urbanization and oceanographic features to better identify suitable areas for use by these whales. The study area was divided into 14 sub-areas based on local coastal geomorphology and discharge of large rivers. The following five ranking criteria were applied to each sub-area: presence of whaling stations and whaling activity in the past; presence and activity of ports; protection from swell, coastal slope and composition of the bottom substrate. The sub-areas that offered conditions conducive to the presence of right whales received higher scores. The proposed criteria were validated by overlapping the ranking scores with the records of right whales sighted in each sub-area. In south-eastern Brazil, protected areas with sandy bottom and gentle slope were associated with more sightings of female-calf pairs. The criteria can be used as a primary diagnostic indicating suitable sub-areas for right whales in poorly known breeding grounds.

scholarly journals An account of some operations executed at Cape Frio, by the officers and crew of His Majesty's ship algerine, for the purpose of raising a part of the stores, &c. lost in His Majesty's ship thetis

1837 ◽  
Vol 3 ◽  
pp. 266-267
Keyword(s):  
Atlantic Ocean ◽  
Rio De Janeiro ◽  
South Atlantic ◽  
The South ◽  
South Eastern ◽  
South West

The author, who had the command of His Majesty’s ship Algerine, was instructed to take charge of the enterprise commenced by the officers and crew of His Majesty’s ship Lightning, having for its object the recovery of the treasure and stores from the wreck of the Thetis, which, in the month of December 1830, had sunk in a cove to the south-east of Cape Frio. He reached this spot on the 6th of March, 1832, having with him eleven officers and eighty-five men. A certain number of men were appointed to remain on board the ship, which was moored in a harbour two miles off a party of artificers and others were employed at the huts which they inhabited near the Cape; and the rest, nearly thirty-five in number, were stationed at the wreck. The author gives a description of Cape Frio, and of the island of which it forms the south-eastern extremity, and which is an immense promontory of insulated granite jutting into the Atlantic Ocean, sixty miles east of Rio de Janeiro. The cove, in the middle of which the wreck of the Thetis lay, is a square indenture in the cliffs, six hundred feet deep by as many wide. It is surrounded by nearly perpendicular masses of granite, from one hundred to two hundred feet high, and is exposed to the whole swell of the South Atlantic, which sets in with remarkable force in that direction. The weather is singularly variable; and transitions frequently take place in the course of few hours, from perfect stillness to the most tremendous swell. The author states that he has witnessed few scenes in nature more sublime than that presented by the Thetis Cove during a gale of wind from the south-west.

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