Science: Conference Contributions
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Item Open Access Constraining the uncertainty associated with sea salt aerosol parametrisations in global models using nudged AMIP simulations(American Geophysical Union (AGU), 2023) Venugopal , Abhijith U.; Revell, Laura; Morgenstern , Olaf; Bhatti , Yusuf A.; Williams , Jonny; Edkins , Nick; Hardacre, Catherine; Jones, AnthonySea salt is the largest source of natural aerosol in the atmosphere by mass. Formed when ocean waves break and bubbles burst, sea salt aerosols (SSA) influence Earth's climate via direct and indirect processes. Models participating in the sixth Coupled Model Intercomparison project (CMIP6) demonstrate a negative effective radiative forcing (ERF) when SSA emissions are doubled. However, the magnitude of the ERF ranges widely from − 0.35 ± 0.04 W m− 2 to − 2.28 ± 0.07 W m− 2, with the largest difference over the Southern Ocean. Differences in the response to doubled SSA emissions arise from model uncertainty (e.g., individual model physics, aerosol size distribution) and parameterization uncertainty (e.g., how SSA is produced in the model). Here, we perform single‐model experiments with UKESM1‐AMIP incorporating all of the SSA parameterizations used by the current generation of CMIP6 Earth system models (ESMs). Using a fixed SSA size distribution, our experiments show that the parameterization uncertainty causes large inter‐model diversity in SSA emissions in the models, particularly over the tropics and the Southern Ocean. The choice of parameterization influences the ambient aerosol size distribution, cloud condensation nuclei and cloud droplet number concentrations, and therefore direct and indirect radiative forcing. We recommend that modeling groups evaluate their SSA parameterizations and update them where necessary in preparation for future model intercomparison activities.Item Open Access Understanding more by studying New Zealand's highest cycle commuting suburb(2024) Roling, L; Lexie, B; Jack, L; Zoē, M-M; Joe, Y; Kingham, SimonItem Open Access Response of snow albedo to experimental additions of bushfire aerosols and algae(2023) Dadic R; Novis P; Hunt J; Vargo L; Purdie, Heather; Fuchs P; Winter-Billington A; Jolly B; Anderson BItem Open Access Mākū, te hā o Haupapa: Moisture, the breath of Haupapa(ACM, 2023) Marks S; Randerson J; Shearer R; Bull R; Purdie, HeatherItem Open Access Transport and equity: Anticipate the unintended, plan for the marginalised(2024) Kingham, SimonItem Open Access OCHT pilot in Ōtautahi(2024) Kingham, Simon; Curl , Angela; Carroll, LiamItem Open Access Shared ambition: Should shared mobility feature in a transition to more equitable and sustainable transport?(2023) Kingham, Simon; Fitt , Helen; Dares , Cushla; Coppens , Anna; Curl , AngelaItem Open Access ACTIVATION active, shared and low carbon transport interventions to enhance wellbeing(2024) Witten , Karen; Raerino, Kimiora; Kingham, Simon; Russell , ElsItem Open Access The role of avalanche deposition on the mass balance of Rolleston Glacier, Arthur’s Pass, New Zealand(2024) Spera , Alison; Purdie, Heather; Kerr , Tim; Rack , WolfgangItem Open Access Rolleston Glacier mass balance: trends and methods of observation(2023) Purdie, Heather; Kerr T; Lorrey A; Vargo L; Porhemmat R; Rack W; Brasington J; Bealing PItem Open Access Impact of crevasses on surface energy balance at an alpine glacier(2023) LIN, DONGQI; Katurji, Marwan; Purdie, HeatherItem Open Access Can free shared e bikes enhance wellbeing among social housing residents(2024) Kingham, Simon; Curl A; Fitt H; Cushla D; Els R; Christina M; James B; Jonathan W; Banwell KItem Open Access Item Open Access The potential for walkable street spaces to enhance wellbeing(2023) Kingham, SimonItem Open Access Item Open Access Developing a resilient transport system while making the world a better place(2023) Kingham, SimonItem Open Access Cycling in Christchurch: we are building it, are they coming?(2024) Kingham, Simon; Frater J; Koorey G; Conrow LItem Open Access The impact of shared mobility on community wellbeing in two contrasting communities in Christchurch(2023) Kingham, Simon; Fitt , Helen; Curl , Angela; Dares , Cushla; Russell , Els; Coppens , Anna; McKerchar , Christina; Conrow , Lindsey; Banwell , Karen; Berghan , James; Williman, JonathanItem Open Access Accidental Superblock: results of closing a street to through traffic?(2024) Kingham, Simon; Banwell , Karen; Curl , AngelaItem Open Access Promoting resilience through teaching, research and public engagement(2023) Kingham, Simon