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

We implement a new stomatal conductance scheme, based on the optimalityapproach, within the Community Atmosphere Biosphere Land Exchange(CABLEv2.0.1) land surface model. Coupled land–atmosphere simulations arethen performed using CABLEv2.0.1 within the Australian Community Climate andEarth Systems Simulator (ACCESSv1.3b) with prescribed sea surfacetemperatures.  As in most land surface models, the default stomatalconductance scheme only accounts for differences in model parametersin relation to the photosynthetic pathway  but not in relation toplant functional types. The new scheme allows model parameters to varyby plant functional type, based on a global synthesis of observationsof stomatal conductance under different climate regimes over a widerange of species. We show that the new scheme reduces the latent heatflux from the land surface over the boreal forests during the NorthernHemisphere summer by 0.5–1.0 mm day<sup>−1</sup>. This leads towarmer daily maximum and minimum temperatures by up to1.0 °C and warmer extreme maximum temperatures by up to1.5 °C.  These changes generally improve the climatemodel's climatology of warm extremes and improve existing biases by10–20 %. The bias in minimum temperatures is however degradedbut, overall, this is outweighed by the improvement in maximum temperatures asthere is a net improvement in the diurnal temperature range in this region.In other regions such as parts of South and North America where ACCESSv1.3bhas known large positive biases in both maximum and minimum temperatures(~ 5 to 10 °C), the new scheme degrades this bias by up to1 °C. We conclude that, although several large biases remain inACCESSv1.3b for temperature extremes, the improvements in the global climatemodel over large parts of the boreal forests during the Northern Hemispheresummer which result from the new stomatal scheme, constrained by a globalsynthesis of experimental data, provide a valuable advance in thelong-term development of the ACCESS modelling system

Implementation of an optimal stomatal conductance scheme in the Australian Community Climate Earth Systems Simulator (ACCESS1.3b)