Influence of Saharan Aerosols on Phytoplankton Biomass in the Tropical North Atlantic Ocean PDF Download
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Author: Aurora M. Justiniano Santos
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 176
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Book Description
Author: Aurora M. Justiniano Santos
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 176
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Book Description
Author: Kristina Dee Anne Mojica
Publisher: Frontiers Media SA
ISBN: 288971652X
Category : Science
Languages : en
Pages : 314
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Book Description
Author: Christopher J. Spells
Publisher:
ISBN:
Category : Aerosols and Ocean Science Expedition
Languages : en
Pages : 126
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Book Description
Author: Hansina Rae Hill
Publisher:
ISBN:
Category : Atmospheric aerosols
Languages : en
Pages : 75
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Book Description
Atmospheric particulate matter has a substantial impact on global climate due to its ability to absorb/scatter solar radiation and act as cloud condensation nuclei (CCN). Yet, little is known about marine aerosol, in particular, the carbonaceous fraction. In the present work, particulate matter was collected, using High Volume (HiVol) samplers, onto quartz fiber substrates during a series of research cruises on the Atlantic Ocean. Samples were collected on board the R/V Endeavor on West and East (March-April, 2006) and East and West (June-July, 2006) transects in the North Atlantic, as well as on the R/V Polarstern during a North and South (October-November, 2005) transect along the western coast of Europe and Africa. The aerosol total carbon (TC) concentrations for the West & ndash;East (Narragansett, RI, USA to Nice, France) and East & ndash;West (Heraklion, Crete, Greece to Narragansett, RI, USA) transects were generally low over the open ocean (0.36±0.14 & mu;g C/m3) and increased as the ship approached coastal areas (2.18±1.37 & mu;g C/m3), due to increased terrestrial/anthropogenic aerosol inputs. The TC for the North & ndash;South transect samples decreased in the southern hemisphere with the exception of samples collected near the 15th parallel where calculations indicate the air mass back trajectories originated from the continent. Seasonal variation in organic carbon (OC) was seen in the northern hemisphere open ocean samples with average values of 0.45 & mu;g/m3 and 0.26 & mu;g/m3 for spring and summer, respectively. These low summer time values are consistent with SeaWiFS satellite images that show decreasing chlorophyll a concentration (a proxy for phytoplankton biomass) in the summer. There is also a statistically significant (p
Author: Victoriya P. Yurchnik
Publisher: Cambridge Scholars Publishing
ISBN: 1443830887
Category : Science
Languages : en
Pages : 115
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Book Description
Atmosphere Aerosol, Phytoplankton and its Influence on Climate Forming in the Pacific Ocean: Measurement New Methods is a collection of new articles by young academics, students and PhD students who participated in the 1st International Sailing Conference of Climate Forcing, held on the board the Sailing Training Ship Nadezhda in the Sea of Japan and the Okhtosk Sea in August 2010. The collection presents a vivid overview of current problems in the research fields of atmosphere aerosol, phytoplankton communities, volcanic activities and hydroacoastics in order to investigate climate change’s influence on phytoplankton communities. This collection of articles will be of interest to researchers and specialists in the fields of atmosphere and ocean monitoring, and climate forcing.
Author: Paraskevi Pitta
Publisher: Frontiers Media SA
ISBN: 2889453197
Category :
Languages : en
Pages : 209
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Book Description
In oligotrophic environments, dust and nutrient inputs via atmospheric routes are considered important sources of macro-nutrients and micro-trace metals fuelling primary and secondary production. Yet, the impact of these dust inputs on the microbial populations is not fully investigated in the Eastern Mediterranean Sea (EMS). The response of oligotrophic systems to dust inputs, whether as positive or negative feedbacks to autotrophic and heterotrophic production and thus to biogeochemical cycling, is important to examine further. Experimental studies have explored nutrient additions in various combinations to determine the limiting resource to productivity or N2 fixation. Recent experimental studies have applied dust enrichments to bottle or mesocosm incubations of seawater from different oceanic regions. This research topic presents two Eastern Mediterranean dust addition mesocosm experiments using, for the first time, real aerosol additions, pure Saharan dust and mixed aerosols (a natural mixture of desert dust and polluted European particles), as well as other EMS aerosol experimental studies. The Topic includes manuscripts introducing results on: a) the impact of Saharan dust vs mixed aerosols on the autotrophic and heterotrophic surface microbial populations in the EMS, b) the impact of single vs multi-pulses of Saharan dust introduction into the pelagic environment of the EMS and c) other experimental studies of aerosol impacts on the EMS ecosystem.
Author: Dennis L. Savoie
Publisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 274
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Author: Andrew Paul Rees
Publisher: Frontiers Media SA
ISBN: 2832543510
Category : Science
Languages : en
Pages : 204
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Book Description
Since 1995 the Atlantic Meridional Transect program (AMT - www.amt-uk.org) has undertaken extensive measurements of oceanographic and atmospheric variables on a passage between the UK and destinations in the South Atlantic (Falkland Islands, Chile, Uruguay and South Africa). This program, which spans up to 100° of latitude, crosses a range of ecosystems from sub-polar to tropical, from eutrophic shelf seas and upwelling systems, to oligotrophic mid-ocean gyres. The AMT was originally conceived to utilise the bi-annual passage of the RRS James Clark Ross (JCR) between its home-base in the UK and its field-base in the Falklands. In 2008, cruises switched from bi-annual to annual, taking place during the boreal autumn (austral spring). Throughout the lifetime of the AMT program, the objectives have evolved to address topical research questions whilst enabling the maintenance of a continuous set of observations relevant to global environmental issues.
Author: Nicole Chisholm
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Marine aerosols play an important role in earth's climate, but their effects remain highly uncertain due to a poor understanding of their sources, properties, and atmospheric processing, partly due to limited measurements. The Coastal-Fog (C-FOG) study investigated the processes controlling the formation and properties of fog in the North Atlantic Ocean. As part of this study, aerosol particle size distributions and chemical composition were measured off the shore of the northeastern United States and Atlantic Canada, and used to investigate the sources and processes affecting the observed aerosols. Processed marine air during the study was characterized by single and bi-modal aerosol size distributions. Aerosols in the port city of St. John's, Newfoundland reflected local emissions built up due to poor ventilation, whereas aerosols in Halifax, Nova Scotia were lower in concentration because the harbour is more spread out. Finally, two particle growth events were observed. The first event captured the appearance of 10 nm particles that grew to 30 nm over 4 h. These aerosols appeared to be newly formed in the upper portion of the boundary layer with influence from the free troposphere before subsiding to the surface. In the second event, 45 nm particles grew to 70 nm over 8 h. The growth of these aerosols was most likely due to the direct condensation of organic vapours emitted from boreal forests and/or the ocean. Our observations provide important insight into the processes affecting marine aerosols and highlight the crucial role of boundary layer meteorology.
Author: Ken S. Carslaw
Publisher: Elsevier
ISBN: 0128231726
Category : Science
Languages : en
Pages : 856
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Book Description
The ever-diversifying field of aerosol effects on climate is comprehensively presented here, describing the strong connection between fundamental research and model applications in a way that will allow both experienced researchers and those new to the field to gain an understanding of a wide range of topics. The material is consistently presented at three levels for each topic: (i) an accessible "quick read" of the essentials, (ii) a more detailed description, and (iii) a section dedicated to how the processes are handled in models. The modelling section in each chapter summarizes the current level of knowledge and what the gaps in this understanding mean for the effects of aerosols on climate, enabling readers to quickly understand how new research fits into established knowledge. Definitions, case studies, reference data, and examples are included throughout. Aerosols and Climate is a vital resource for graduate students, postdoctoral researchers, senior researchers, and lecturers in departments of atmospheric science, meteorology, engineering, and environment. It will also be of interest to those working in operational centers and policy-facing organizations, providing strong reference material on the current state of knowledge. Includes a section in each chapter that focuses on the treatment of relevant aerosol processes in climate models Provides clear exposition of the challenges in understanding and reducing persistent gaps in knowledge and uncertainties in the field of aerosol-climate interaction, going beyond the fundamentals and existing knowledge Authored by experts in modeling and aerosol processes, analysis or observations to ensure accessibility and balance
