MEAD: an interdisciplinary study of the marine effects of atmospheric deposition in the Kattegat.
This paper summarises the results of the EU funded MEAD project, an interdisciplinary study of the effects of atmospheric nitrogen deposition on the Kattegat Sea between Denmark and Sweden. The study considers emissions of reactive nitrogen gases, their transport, transformations, deposition and effects on algal growth together with management options to reduce these effects. We conclude that atmospheric deposition is an important source of fixed nitrogen to the region particularly in summer, when nitrogen is the limiting nutrient for phytoplankton growth, and contributes to the overall eutrophication pressures in this region. However, we also conclude that it is unlikely that atmospheric deposition can, on its own, induce algal blooms in this region. A reduction of atmospheric nitrogen loads to this region will require strategies to reduce emissions of ammonia from local agriculture and Europe wide reductions in nitrous oxide emissions.
Spokes
L
L
School of Environmental Sciences, University of East Anglia, East Anglia, UK.
Jickells
T
T
Weston
K
K
Gustafsson
B G
BG
Johnsson
M
M
Liljebladh
B
B
Conley
D
D
Ambelas-Skjødth
C
C
Brandt
J
J
Carstensen
J
J
Christiansen
T
T
Frohn
L
L
Geernaert
G
G
Hertel
O
O
Jensen
B
B
Lundsgaard
C
C
Markager
S
S
Martinsen
W
W
Møller
B
B
Pedersen
B
B
Sauerberg
K
K
Sørensen
L L
LL
Hasager
C C
CC
Sempreviva
A M
AM
Pryor
S C
SC
Lund
S W
SW
Larsen
S
S
Tjernström
M
M
Svensson
G
G
Zagar
M
M
D000383:Agriculture; D000393:Air Pollutants; D000641:Ammonia; D001682:Biological Availability; D018533:Biomass; D003718:Denmark; D004784:Environmental Monitoring / Q000379:methods; D004787:Environmental Pollution / Q000517:prevention & control; D056890:Eukaryota / Q000254:growth & development*; D005068:Eutrophication; D008962:Models, Theoretical; D009584:Nitrogen; D009609:Nitrous Oxide; D009792:Oceans and Seas; D010839:Phytoplankton / Q000254:growth & development; D012621:Seasons; D013548:Sweden
D000393:Air Pollutants; D000641:Ammonia; D009609:Nitrous Oxide; D009584:Nitrogen