Responses of Arctic black carbon and surface temperature to multi-region emission reductions: a Hemispheric Transport of Air Pollution Phase 2 (HTAP2) ensemble modeling study Journal Article uri icon

Overview

abstract

  • Abstract. Black carbon (BC) emissions play an important role in regional climate; change in the Arctic. It is necessary to pay attention to the impact of; long-range transport from regions outside the Arctic as BC emissions from; local sources in the Arctic were relatively small. The task force; Hemispheric Transport of Air Pollution Phase 2 (HTAP2) set up a series of; simulation scenarios to investigate the response of BC in a given region to; different source regions. This study investigated the responses of Arctic BC; concentrations and surface temperature to 20 % anthropogenic emission; reductions from six regions in 2010 within the framework of HTAP2 based on; ensemble modeling results. Emission reductions from East Asia (EAS) had the most; (monthly contributions: 0.2–1.5 ng m−3) significant impact on the; Arctic near-surface BC concentrations, while the monthly contributions from; Europe (EUR), Middle East (MDE), North America (NAM), Russia–Belarus–Ukraine; (RBU), and South Asia (SAS) were 0.2–1.0, 0.001–0.01, 0.1–0.3, 0.1–0.7, and 0.0–0.2 ng m−3,; respectively. The responses of the vertical profiles of the Arctic BC to the; six regions were found to be different due to multiple transport pathways.; Emission reductions from NAM, RBU, EUR, and EAS mainly influenced the BC; concentrations in the low troposphere of the Arctic, while most of the BC in the; upper troposphere of the Arctic derived from SAS. The response of the Arctic; BC to emission reductions in six source regions became less significant with; the increase in the latitude. The benefit of BC emission reductions in terms; of slowing down surface warming in the Arctic was evaluated by using; absolute regional temperature change potential (ARTP). Compared to the; response of global temperature to BC emission reductions, the response of; Arctic temperature was substantially more sensitive, highlighting the need; for curbing global BC emissions.;

publication date

  • June 8, 2021

has restriction

  • gold

Date in CU Experts

  • February 8, 2022 10:08 AM

Full Author List

  • Zhao N; Dong X; Huang K; Fu JS; Lund MT; Sudo K; Henze D; Kucsera T; Lam YF; Chin M

author count

  • 11

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1680-7324

Additional Document Info

start page

  • 8637

end page

  • 8654

volume

  • 21

issue

  • 11