Two decades of flask observations of atmospheric δ (O 2 ∕N 2 ), CO 2 , and APO at stations Lutjewad (the Netherlands) and Mace Head (Ireland), and 3 years from Halley station (Antarctica)

We present 20-year flask sample records of atmospheric CO 2 , δ ( O 2 / N 2 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="34pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="35807b8797f1e0b891dc79aac47c042b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="essd-14-991-2022-ie00004.svg" width="34pt" height="14pt" src="essd-14-991-2022-ie00004.png"/></svg:svg> ), and atmospheric potential oxygen (APO) from the stations Lutjewad (the Netherlands) and Mace Head (Ireland), and a 3-year record from Halley station (Antarctica). We include det... Mehr ...