To promoting and maintain cooperation with the University of California, Irvine, USA, on March 6, 2025, the Management Board of Phong Nha – Ke Bang National Park had a meeting to welcome and work with the research team of University of California, Irvine that led by Ms. Kathleen Rose Johnson, Professor, PhD, Department of Earth System Sciences (ESS). On behalf of the National Park Management Board, there was Mr. Dinh Huy Tri, Deputy Director of the National Park Management Board and representatives of the leaders of the divisions and subordinate units are at the meeting. In addition to the members of the research team from the University of California, Irvine, there was the presence of Ms. Deborah Limbert, an expert from the British Royal Cave Association, who also attended the meeting. The team of University of California, Irvine reported and discussed the results of the joint research Two sides evaluated the results of joint scientific research on paleoclimate in Phong Nha – Ke Bang National Park in the past and discussed cooperation plans in the coming time. Accordingly, from March 2020 to present, the research team led by Professor Dr. Kathleen Johnson has conducted 04 field research trips in Phong Nha – Ke Bang National Park. The research team will integrate with data from previous climate records of other areas by collecting environmental data (temperature, humidity, CO2) and analyzing soil samples, rainwater, drip water in caves, oxygen isotope analysis and chemical composition measurements, to apply to models serving climate forecasting