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Interactive comment on “ Impact of El Niño Southern Oscillation on the interannual variability of methane and tropospheric ozone ”
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rowlinson, Matthew J. |
| Copyright Year | 2019 |
| Abstract | To me, the first sentence of the abstract gives the impression that the focus of this study is the analysis of methane trends and variability which is currently being intensely debated in the literature (Turner et al., 2019; Nisbet et al., 2019). Unless I misunderstood, the paper is geared towards analyzing the impact of ENSO on carbon monoxide, tropospheric ozone, hydroxyl radical as well as methane. The influence of ENSO on methane variability is discussed here but a full analysis of the methane growth rate is not performed in this study. Lines 45-47 better reflect the analyses performed here. The first couple of sentences should be revised so that they accurately represent the focus of this study which I understand to be ENSO driven changes in atmospheric composition and their impacts rather than just methane growth rate. Section 2.1: How does the model calculate biogenic VOC emissions? Given that VOC oxidation is an important source of CO (about 15% according to Duncan et al. 2007), I would imagine that variability in VOC emissions (driven by variations in meteorology, radiation, land-use, CO2) (Lathiere et al., 2005) would have some impact on CO IAV. L133-134: Emissions of “all source of methane have been included in the model.” Could you please elaborate on which sources of methane emissions have been included in the model? L135: Replace nitrous oxide (which is N2O) with nitrogen oxide. L137-139: What emissions does JULES simulate? Wetlands? Agriculture? Please clarify. Section 3: Given that the model is being used to analyse the impact of El Nino, in addition to the climatological evaluation discussed in this section, a more focused evaluation against measurements in El Nino years would more appropriately build confidence in the model’s ability to capture features unique to conditions in these years. L167-168: Are averaging kernels applied to model output for evaluation against satellite |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/acp-2019-222/acp-2019-222-RC1-print.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/acp-2019-222/acp-2019-222-RC2.pdf |
| Alternate Webpage(s) | https://www.atmos-chem-phys-discuss.net/acp-2019-222/acp-2019-222-AC1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
