Ozone depletion: ultraviolet radiation and phytoplankton biology in antarctic waters.

  title={Ozone depletion: ultraviolet radiation and phytoplankton biology in antarctic waters.},
  author={R. C. G. Smith and Barbara B. Pr{\'e}zelin and Karen S. Baker and Robert R. Bidigare and Nicholas P. Boucher and Teresa Lynn Coley and Deneb Karentz and Sally MacIntyre and H. Allen Matlick and David W. Menzies},
  volume={255 5047},
The springtime stratospheric ozone (O3) layer over the Antarctic is thinning by as much as 50 percent, resulting in increased midultraviolet (UVB) radiation reaching the surface of the Southern Ocean. There is concern that phytoplankton communities confined to near-surface waters of the marginal ice zone will be harmed by increased UVB irradiance penetrating the ocean surface, thereby altering the dynamics of Antarctic marine ecosystems. Results from a 6-week cruise (Icecolors) in the marginal… 

Ultraviolet Radiation and Bottom‐Ice Algae: Laboratory And Field Studies from Mcmurdo Sound, Antarctica

Springtime ozone depletion in the Antarctic has allowed high levels of ultraviolet radiation to reach the Earth's surface, and this may adversely affect the productivity of phytoplankton growing in

Inhibition of marine photosynthesis by ultraviolet radiation: Variable sensitivity of phytoplankton in the Weddell‐Scotia Confluence during the austral spring

The results suggest that nonlinear exposure-response relationships are necessary for modeling UV-dependent photosynthesis in the surface mixed layer of the springtime Weddell-Scotia Confluence, and modified the laboratory-based model of photosynthesis and photoinhibition to describe photoin inhibition as a nonlinear function of biologically weighted cumulative exposure to damaging irradiance.


With the seasonal formation of the ozone hole over Antarctica, there is much concern regarding the effects of increased solar UV‐B radiation (280–320 nm) on the marine ecosystem in the Southern

Impact of a deep ozone hole on Southern Ocean primary production

[1] Field studies show that photosynthesis by Antarctic phytoplankton is inhibited by the increased ultraviolet radiation (UVR) resulting from springtime stratospheric ozone (O 3 ) depletion. To

Influence of Ozone-Related Increases in Ultraviolet Radiation on Antarctic Marine Organisms

SYNOPSIS. Every spring for the past two decades, depletion of stratospheric ozone has caused increases in ultraviolet B radiation (UVB, 280–320 nm) reaching Antarctic terrestrial and aquatic

Influence of Ozone-Related Increases in Ultraviolet Radiation on Antarctic Marine Organisms1

Abstract Every spring for the past two decades, depletion of stratospheric ozone has caused increases in ultraviolet B radiation (UVB, 280–320 nm) reaching Antarctic terrestrial and aquatic habitats.

Transparency of Antarctic ice‐covered lakes to solar UV radiation

Depth profiles of solar ultraviolet radiation (UVR), photosynthetically available radiation (PAR), and related variables were measured beneath the thick, permanent ice cover of four lakes in the

Interactive effects of ozone depletion and vertical mixing on photosynthesis of Antarctic phytoplankton

Photosynthesis of Antarctic phytoplankton is inhibited by ambient ultraviolet (UV) radiation during incubations, and the inhibition is worse in regions beneath the Antarctic ozone ‘hole’. But to

UV radiation and potential biological effects beneath the perennial ice cover of an antarctic lake

High-resolution spectral scans of solar ultraviolet radiation (UVR) were obtained directly beneath the 4.0–5.0 m thick, perennial ice cover of Lake Hoare, South Victoria Land, Antarctica. Both UVA

Ultraviolet radiation, ozone depletion, and marine photosynthesis

Results show that although UVB photons are more damaging than UVA (320–400 nm), the greater fluxes of UVA in the ocean cause more UV inhibition, and models can be used to analyze the sensitivity of water column productivity to UVB and ozone depletion.




Abstract Human activities may cause a 16% reduction of stratospheric ozone. The concomitant increase in solar UV‐B radiation reaching the surface of the earth could detrimentally affect the

Ultraviolet Radiation Levels During the Antarctic Spring

Model calculations show that UV irradiances encountered during the occurrence of an Antarctic "ozone hole" remain less than those typical of a summer solstice at low to middle latitudes, but the low ozone amounts observed in October 1987 imply biologically effective irradiances for McMurdo Station, Antarctica that are comparable to or greater than those for the same location at December solstice.

Phytoplankton Bloom Produced by a Receding Ice Edge in the Ross Sea: Spatial Coherence with the Density Field

Measurements of chlorophyll, particulate carbon, and biogenic silica concentrations near a receding ice edge off the coast of Victoria Land, Antarctica, indicated the presence of a dense

Free Radicals Within the Antarctic Vortex: The Role of CFCs in Antarctic Ozone Loss

Recent advances in understanding of the kinetics, photochemistry, and structural details of key intermediates in these catalytic cycles as well as an improved absolute calibration for ClO and BrO concentrations at the temperatures and pressures encountered in the lower antarctic stratosphere have been essential for defining the link.

Importance of Phaeocystis blooms in the high-latitude ocean carbon cycle

THE Greenland Sea is particularly important to the world ocean circulation, and potentially to carbon dioxide exchange between the ocean and atmosphere, because it is an area of surface convergence

The ecological significance of solar UV radiation on aquatic organisms

Stratospheric ozone shields the Earth from much of the solar UV – B radiation which is the most biologically injurious component of sunlight. It is possible that both human technologies and natural

Stratospheric Ozone, Middle Ultraviolet Radiation, and Carbon-14 Measurements of Marine Productivity

The carbon-14 technique (short-term incubations) is inadequate for assessment of possible large amplification factor photoprocesses that may be ecologically significant.