English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present air–sea fluxes of carbon dioxide (CO2), methane (CH4),momentum, and sensible heat measured by the eddy covariance method from therecently established Penlee Point Atmospheric Observatory (PPAO) on the south-west coast of the United Kingdom. Measurements from the south-westerly direction(open water sector) were made at three different sampling heights(approximately 15, 18, and 27 m above mean sea level, a.m.s.l.), each from adifferent period during 2014–2015. At sampling heights  ≥  18 m a.m.s.l., measured fluxes of momentum and sensible heat demonstratereasonable ( ≤  ±20 % in the mean) agreement with transfer ratesover the open ocean. This confirms the suitability of PPAO for air–seaexchange measurements in shelf regions. Covariance air–sea CO2 fluxesdemonstrate high temporal variability. Air-to-sea transport of CO2declined from spring to summer in both years, coinciding with the breakdownof the spring phytoplankton bloom. We report, to the best of our knowledge,the first successful eddy covariance measurements of CH4 emissions from amarine environment. Higher sea-to-air CH4 fluxes were observed duringrising tides (20 ± 3; 38 ± 3;29 ± 6 µmole m−2 d−1 at 15, 18, 27 m a.m.s.l.)than during falling tides (14 ± 2; 22 ± 2;21 ± 5 µmole m−2 d−1), consistentwith an elevated CH4 source from an estuarine outflow driven by localtidal circulation. These fluxes are a few times higher than the predictedCH4 emissions over the open ocean and are significantly lower thanestimates from other aquatic CH4 hotspots (e.g. polar regions,freshwater). Finally, we found the detection limit of the air–sea CH4flux by eddy covariance to be 20 µmole m−2 d−1 overhourly timescales (4 µmole m−2 d−1 over 24 h)

atmospheric chemistry and physics

Air–sea fluxes of CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; and CH&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; from the Penlee Point Atmospheric Observatory on the south-west coast of the UK