Aerosol forcing masks and delays the formation of the North-Atlantic warming hole by three decades by Dagan, G, Stier, P, Watson-Parris, D

“…Despite the known key role of the North-Atlantic surface temperatures in setting the Northern-Hemisphere climate, the mechanisms behind the NAWH are still not fully understood. …”

Has Reducing Ship Emissions Brought Forward Global Warming? by Gettelman, A, Christensen, MW, Diamond, MS, Gryspeerdt, E, Manshausen, P, Stier, P, Watson‐Parris, D, Yang, M, Yoshioka, M, Yuan, T

“…Analysis of recent temperature anomalies indicates Northern Hemisphere surface temperature anomalies in 2022–2023 are correlated with observed cloud radiative forcing and the cloud radiative forcing is spatially correlated with the simulated radiative forcing from the 2020 shipping emission changes. …”

Consistent simulation of bromine chemistry from the marine boundary layer to the stratosphere - Part 1: Model description, sea salt aerosols and pH by Kerkweg, A, Joeckel, P, Pozzer, A, Tost, H, Sander, R, Schulz, M, Stier, P, Vignati, E, Wilson, J, Lelieveld, J

“…The aerosol pH ranges from alkaline aerosol in areas of strong production down to pH-values of 1 over regions of medium sea salt production and high levels of gas phase acids, mostly polluted regions over the oceans in the Northern Hemisphere.…”

Consistent simulation of bromine chemistry from the marine boundary layer to the stratosphere - Part 1: Model description, sea salt aerosols and pH by Kerkweg, A, Jöckel, P, Pozzer, A, Tost, H, Sander, R, Schulz, M, Stier, P, Vignati, E, Wilson, J, Lelieveld, J

“…The aerosol pH ranges from alkaline aerosol in areas of strong production down to pH-values of 1 over regions of medium sea salt production and high levels of gas phase acids, mostly polluted regions over the oceans in the Northern Hemisphere.…”

Consistent simulation of bromine chemistry from the marine boundary layer to the stratosphere, Part I: model description, sea salt aerosols and pH by Kerkweg, A, Jöckel, P, Pozzer, A, Tost, H, Sander, R, Schulz, M, Stier, P, Vignati, E, Wilson, J, Lelieveld, J

“…The aerosol pH ranges from alkaline aerosol in areas of strong production down to pH values of 1 over regions of medium sea salt production and high levels of gas phase acids, mostly polluted regions over the oceans in the northern hemisphere.…”

Application of the CALIOP layer product to evaluate the vertical distribution of aerosols estimated by global models: AeroCom phase I results by Koffi, B, Schulz, M, Breon, F, Griesfeller, J, Winker, D, Balkanski, Y, Bauer, S, Berntsen, T, Chin, M, Collins, W, Dentener, F, Diehl, T, Easter, R, Ghan, S, Ginoux, P, Gong, S, Horowitz, L, Iversen, T, Kirkevag, A, Koch, D, Krol, M, Myhre, G, Stier, P, Takemura, T

“…Over industrial and maritime regions, most models show higher Z than observed by CALIOP, whereas over the African and Chinese dust source regions, Z is underestimated during Northern Hemisphere Spring and Summer. The positive model bias in Z is mainly due to an overestimate of the extinction above 6 km. …”

Trace gas and aerosol interactions in the fully coupled model of aerosol-chemistry-climate ECHAM5-HAMMOZ: 2. Impact of heterogeneous chemistry on the global aerosol distributions by Pozzoli, L, Bey, I, Rast, S, Schultz, MG, Stier, P, Feichter, J

“…For example, in the main polluted regions of the Northern Hemisphere, AOD and ABS increase by 10-30% and up to 15%, respectively, in winter. …”

The Global Aerosol Synthesis and Science Project (GASSP): measurements and modelling to reduce uncertainty by Reddington, C, Carslaw, K, Stier, P, Schutgens, N, Coe, H, Liu, D, Allan, J, Browse, J, Pringle, K, Lee, L, Yoshioka, M, Johnson, J, Regayre, L, Spracklen, D, Mann, G, Clarke, A, Hermann, M, Henning, S, Wex, H, Kristensen, T, Leaitch, W, Pöschl, U, Rose, D, Andreae, M, Schmale, J, Kondo, Y, Oshima, N, Schwarz, J, Nenes, A, Anderson, B, Roberts, G, Snider, J, Leck, C, Quinn, P, Chi, X, Ding, A, Jimenez, J, Zhang, Q

“…Available measurements are extensive, but they biased to polluted regions of the northern hemisphere, leaving large pristine regions and many continental areas poorly sampled. …”

Description and evaluation of aerosol in UKESM1 and HadGEM3-GC3.1 CMIP6 historical simulations by Mulcahy, JP, Johnson, C, Jones, CG, Povey, AC, Scott, CE, Sellar, A, Turnock, ST, Woodhouse, MT, Abraham, NL, Andrews, MB, Bellouin, N, Browse, J, Carslaw, KS, Dalvi, M, Folberth, GA, Glover, M, Grosvenor, DP, Hardacre, C, Hill, R, Johnson, B, Jones, A, Kipling, Z, Mann, G, Mollard, J, O'Connor, FM, Palmiéri, J, Reddington, C, Rumbold, ST, Richardson, M, Schutgens, NAJ, Stier, P, Stringer, M, Tang, Y, Walton, J, Woodward, S, Yool, A

“…Simulated aerosol number concentrations are generally within a factor of 2 of the observations, with both models tending to overestimate number concentrations over remote ocean regions, apart from at high latitudes, and underestimate over Northern Hemisphere continents. Finally, a new primary marine organic aerosol source is implemented in UKESM1 for the first time. …”