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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Eddy-covariance measurements of carbon dioxide fluxes were takencontinuously between October 2006 and May 2008 at 190 m height in centralLondon (UK) to quantify emissions and study their controls. Inner London,with a population of 8.2 million (~5000 inhabitants per km2) isheavily built up with 8% vegetation cover within the central boroughs.CO2 emissions were found to be mainly controlled by fossil fuelcombustion (e.g. traffic, commercial and domestic heating). The measurementperiod allowed investigation of both diurnal patterns and seasonal trends.Diurnal averages of CO2 fluxes were found to be correlated with trafficbut also exhibited an inverse dependency on atmospheric stability in thenear-neutral range, with higher fluxes coinciding with unstablestratification during most seasons and perhaps reflecting how changes inheating-related natural gas consumption and, to a lesser extent,photosynthetic activity controlled the seasonal variability. Despitemeasurements being taken at ca. 22 times the mean building height, couplingwith street level was adequate, especially during daytime. Night-time saw ahigher occurrence of stable or neutral stratification, especially in autumnand winter, which resulted in data loss in post-processing and caused thetower to become decoupled from street level. CO2 fluxes observed atnight were not always correlated with traffic counts, probably reflectingthis decoupling, but also the fact that at night heating was always a largersource than traffic. No significant difference was found betweenthe annual estimate of net exchange of CO2 for the expected measurementfootprint and the values derived from the National Atmospheric EmissionsInventory (NAEI), with daytime fluxes differing by only 3%. Thisagreement with NAEI data also supported the use of the simple flux footprintmodel which was applied to the London site; this also suggests thatindividual roughness elements did not significantly affect the measurementsdue to the large ratio of measurement height to mean building height

Controls of carbon dioxide concentrations and fluxes above central London