Area of research
Global and Planetary Change · Atmospheric Science
Research interest
Pep is a Chief Research Scientist in CSIRO Environment, Chief Lead Investigator in the Climate Systems Hub of the National Environmental Science Program, and the Executive Director of the Global Carbon Project, a global consortium of scientists under the umbrella of Future Earth and a scientific partner of the World Climate Research Programme. Pep holds a BSc, a MSc, and a PhD degree in Biology and Terrestrial Ecology from the University Autonomous of Barcelona, Catalonia (Spain). Upon completing his PhD and throughout the 1990s, Pep held three research positions in the USA at San Diego State University, the University of California at Berkeley, and Stanford University. He then moved to CSIRO in Australia, where he has been working since. Pep focuses on collaborative and highly integrative research to develop national, continental, and global budgets and trend analyses of the main greenhouse gases. He also studies the size and vulnerability of Earth’s carbon sinks and pools, carbon-climate feedbacks, and pathways to net-zero emissions, including land-based carbon sequestration and negative emissions. He has also focused on abrupt impacts and ecosystem collapse resulting from climate change, particularly due to wildfires. He draws on a robust understanding of regional and global biogeochemical cycles to inform the formulation of sub-national, national, and international policies and actions to mitigate climate change. Pep has contributed to the United Nations' Intergovernmental Panel on Climate Change (IPCC) for the last 20 years and has participated in multiple assessments by the World Meteorological Organization. Pep is a fellow of the Australian Academy of Science, the Australian Academy of Technological Sciences and Engineering, and the American Geophysical Union. Reuters named him the 8th most influential climate scientist in the world in 2021. Pep has co-authored over 300 peer-reviewed research papers (with 80 papers in the journals of Nature/s and Science). He
Ten new insights in climate science 2024
Mapping the world's inland surface waters: an upgrade to the Global Lakes and Wetlands Database (GLWD v2)
Ensemble estimates of global wetland methane emissions over 2000–2020
Large live biomass carbon losses from droughts in the northern temperate ecosystems during 2016-2022
Emerging climate impact on carbon sinks in a consolidated carbon budget
Global Carbon Budget 2025
Open letter: There are more than just trees and forests to be conserved and restored
The global hydrogen budget
The North American Greenhouse Gas Budget: Emissions, Removals, and Integration for CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O (2010–2019): Results From the Second REgional Carbon Cycle Assessment and Processes Study (RECCAP2)
Global nitrous oxide budget (1980–2020)
Trends and Drivers of Terrestrial Sources and Sinks of Carbon Dioxide: An Overview of the TRENDY Project
A perspective on the next generation of Earth system model scenarios: towards representative emission pathways (REPs)
Mapping the world’s inland surface waters: an update to the Global Lakes and Wetlands Database (GLWD v2)
Global methane emissions from rice paddies: CH4MOD model development and application
Soil nitrous oxide emissions across the northern high latitudes
Evidence and attribution of the enhanced land carbon sink
Harmonising the land-use flux estimates of global models and national inventories for 2000–2020
Net-zero approaches must consider Earth system impacts to achieve climate goals
Ten new insights in climate science 2023
Global Nitrous Oxide Budget 1980–2020
A perspective on the next generation of Earth system model scenarios: towards representative emission pathways (REPs)
The greenhouse gas budget of terrestrial ecosystems in East Asia since 2000
Comment on essd-2023-401, Figure 1
Comment on Global Nitrous Budget 1980-2020
Global Carbon Budget 2022
Global Carbon Budget 2021
Global and Regional Trends and Drivers of Fire Under Climate Change
The size of the land carbon sink in China