Publications by authors named "Jesper B Liisberg"
Proc Natl Acad Sci U S A
October 2024
Article Synopsis
- The study examines abrupt climate changes during the Pleistocene Ice Ages, known as Dansgaard-Oeschger (DO) oscillations, using Greenland ice cores to analyze temperature shifts and their potential long-term impacts.
- It introduces new ice-core records from southern and eastern Greenland to enhance understanding of DO event magnitudes and creates a multiproxy assessment of their effects across Greenland.
- The findings suggest that variations in wintertime sea ice in the North Atlantic subpolar gyre are crucial for explaining DO variability, and that changes in vapor source distribution, rather than site temperature, mainly influence Greenland's isotope signals during these climate transitions.
Proc Natl Acad Sci U S A
August 2023
Article Synopsis
- Active chlorine in the atmosphere affects methane oxidation, leading to uncertainty in methane budget assessments globally due to limited understanding of its production and role.
- A new photocatalytic mechanism suggests chlorine atoms are produced when Sahara dust interacts with sea spray aerosol, validated through modeling and explaining long-standing observations of carbon depletion in air samples from Barbados and the CO:ethane ratio at Cape Verde.
- Increased chlorine production, particularly in the North Atlantic, alters methane budget models and can lead to miscalculations in methane emissions from biological sources like agriculture and wetlands, complicating our understanding of recent methane increases linked to North African dust emissions.
