Introduction: Process studies at the air–sea interface after atmospheric deposition in the Mediterranean Sea – objectives and strategy of the PEACETIME oceanographic campaign (May–June 2017)
<p>In spring, the Mediterranean Sea, a well-stratified low-nutrient–low-chlorophyll region, receives atmospheric deposition by both desert dust from the Sahara and airborne particles from anthropogenic sources. Such deposition translates into a supply of new nutrients and trace metals for the...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-11-01
|
| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/17/5563/2020/bg-17-5563-2020.pdf |
| Summary: | <p>In spring, the Mediterranean Sea, a well-stratified low-nutrient–low-chlorophyll region, receives atmospheric deposition by both desert dust from
the Sahara and airborne particles from anthropogenic sources. Such
deposition translates into a supply of new nutrients and trace metals for
the surface waters that likely impact biogeochemical cycles. However, the
relative impacts of the processes involved are still far from being assessed
in situ. After summarizing the knowledge on dust deposition and its impact
on the Mediterranean Sea biogeochemistry, we present in this context the
objectives and strategy of the PEACETIME project and cruise. Atmospheric and
marine in situ observations and process studies have been conducted in
contrasted areas encountering different atmospheric deposition context,
including a dust deposition event that our dedicated “fast-action” strategy
allowed us to catch. Process studies also include artificial dust seeding
experiments conducted on board in large tanks in three
ecoregions of the open waters of the Mediterranean Sea for the first time. This paper
summarizes the work performed at sea and the type of data acquired in the
atmosphere, at the air–sea interface and in the water column. An overview of
the results presented in papers of this special issue (and in some others
published elsewhere) is presented.</p> |
|---|---|
| ISSN: | 1726-4170 1726-4189 |