香港六合彩中特网

The report听highlights that limiting warming to close to 1.5掳C or 2掳C will be impossible without immediate, rapid and large-scale action to reduce levels of carbon dioxide (CO₂) and other greenhouse gas emissions. It also highlights the physical science behind climate change,听highlights that the changes in the Earth鈥檚 climate have already been observed in every region of the globe and across the whole climate system, including the听atmosphere, oceans, rivers and lakes, and land, many of which are unprecedented.

Published ahead of COP26, the UN Climate Change Conference being held in November in Glasgow, the report is the first of three volumes from IPCC Working Groups to be released听over the next eight months,听providing a collective view of the latest science on climate change as agreed by 195 member governments of the IPCC.

The report 听involved contributions from hundreds of scientists around the world, including three from 香港六合彩中特网, who assessed evidence from over 14,000 scientific publications.

There is a clear consensus within听the report that global warming intensifies precipitation, resulting in fewer but heavier rainfalls and snowfalls. The hydrological consequences include reduced soil moisture as well as an increased frequency and severity of floods and droughts.

These changes have vital repercussions for global food and water security. The report also provides evidence of potential 鈥榮ilver lining鈥� to this transformation in precipitation. Replenishment of groundwater, the world鈥檚 largest distributed store of freshwater, is often found to occur disproportionately from heavy rainfalls.

香港六合彩中特网 Professor of Earth System Science Mark Maslin (香港六合彩中特网 Geography) said:听

This report is a scientific and political wake-up call for all governments of the world to take climate change seriously. It acts as a reminder of the urgency of the climate crisis. Governments must now work in solidarity, taking heed of this report and increasing their ambitions to ensure we can avoid the worst of climate change, adapt to its impacts, and protect our most vulnerable populations.听

The science in this report must inform the firm pledges, commitments and binding agreements made at COP26 later this year, helping ensure we can halve global emissions by 2030 and hit net zero by 2050 to limit warming to 1.5藲C.鈥�
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听Dr Chris Brierley (香港六合彩中特网 Geography), a contributor to Chapter 3 on 鈥楬uman Influence on the Climate System鈥�,听said:听

Previous reports have clearly highlighted the urgency of the issue but since then, we鈥檝e learnt even more about the science behind climate change. It鈥檚 now more important than ever that we adapt to the climatic changes we鈥檙e already experiencing and rapidly put new systems in place that mean听we can stop burning fossil fuels, which are the key cause of this warming.鈥�

听PhD student Anni Zhao (香港六合彩中特网 Geography) also contributed to Chapter 3, stating:听

鈥�Using the latest climate models together with updated paleo record and observations, we were able to听update our assessment of听human influence on the climate system听since the last IPCC reports. We found that human influence is more clearly linked to changes in global sea听level rise,听ocean heat content听and sub-surface ocean salinity,听as well as changes in rainfall, snow cover and atmospheric circulation.鈥�

听Commenting on the findings of Chapter 8 on 鈥榃ater Cycle Changes鈥�, report contributor Professor Richard Taylor (香港六合彩中特网 Geography) noted that:

This latest report provides new insight into the听hydrological consequences of climate change.听

Previously, it was thought that global warming amplified existing variations in precipitation with wet areas becoming wetter and dry areas becoming drier. This assumption has been found to be invalid so that the impact of climate change on where and when rain or snow will fall is even more uncertain than previous assessments had claimed.鈥�

The reports aim to help policymakers understand what scientists know about climate change, provide the most up-to-date knowledge to address issues related to climate change, and form the scientific basis to inform climate change policies - as well as the UN Sustainable Development Goals. They are considered an important resource for society, domestic policymaking, and global climate negotiations, including November鈥檚 COP26.

Professor Michael Grubb 鈥� Professor of Energy & Climate Change and Research Director of Institute of Sustainable Resources, is part of working group 3.

Links

• The full report听
• 香港六合彩中特网 Faculty of Social & Historial Sciences听

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