For those of you who are interested in calculating marine CO₂ system variables, we are happy to let you know that propagating uncertainty in these calculations just got easier. IAEA Ocean Acidification International Coordination Centre (OA-ICC) funded an effort to code a consistent set of tools in several public packages. Uncertainty propagation add-ons are now available for four of these packages: CO2SYS-Excel, CO2SYS-MATLAB, seacarb, and mocsy. Clicking on those links will lead you directly to the archive where each package can be downloaded, on CRAN for seacarb and on GitHub for the other 3 packages.  Links to the uncertainty propagation add-ons can also be found on our Standards and Methods site. A new publication detailing this effort, the tools, and interpretation of results is now available (Orr et al., 2018). The authors highlight, among other things, the use of a new error-space diagram to assess how propagated uncertainty changes with different input uncertainties. The paper also concludes that uncertainties from the constants often dominate propagated uncertainty, so that measurement uncertainty plays little role.

We would like to let you know that the Global Carbon Budget 2018 has now been published. Please see the Global Carbon Project website (http://www.globalcarbonproject.org) to access the highlights, paper, data, and a myriad of figures, infographics and videos related to the annual update of the global carbon budget and trends for the year 2017, and projections for 2018. You may also want to visit the Global Carbon Atlas http://www.globalcarbonatlas.org to explore in detail global and national CO₂ emissions.

We would like to let you know about the 18^th International Swiss Climate Summer School 2019 "Carbon and Climate in the Paris World: Getting out of the Fossil Fuel Carbon Budget Crunch" which will be held on 8 – 13 September 2019, in Ascona, Switzerland. The motivation for this highly interdisciplinary summer school is the current paradoxical situation wherein the internationally recognized warming targets of 2°C or even 1.5°C imply a tightly limited fossil fuel emission budget for the entire 21^st century, while the trends in the fossil fuel emissions suggest that this budget is consumed within the next one to three decades. With conventional mitigation and adaptation options not sufficiently exploited, humankind may need to deploy unconventional methods to meet its climate target. This summer school addresses Early Stage Researchers from the climate, engineering, social and economic sciences.

Application deadline: 11 January 2019.