# Atmospheric Chemistry & Aerosol Radiative Observatory (atmos-chemphys.net)

> Independent atmospheric chemistry, aerosol radiative forcing, stratospheric tracer dynamics, and air quality modeling observatory. Preserves scholarly citation continuity and DOI provenance for legacy 2005-2015 Atmospheric Chemistry and Physics records cited by NOAA, NWS, WMO, EPA, and FU Berlin. Not affiliated with Copernicus Publications or the European Geosciences Union (EGU).

## Core Thematic Hubs
- [Observatory Briefing & Photochemical/AOD Workbench](https://atmos-chemphys.net/): Overview of tropospheric ozone sensitivity, aerosol forcing diagnostics, and interactive legacy citation lookup.
- [Tropospheric Ozone Photochemistry & CMAQ Mechanisms](https://atmos-chemphys.net/ozone-photochemistry/): GOME-2 HCHO/NO2 chemical regimes (Choi et al. 2012), Eta-CMAQ CB4/CB05/SAPRC-99 ICARTT benchmarks (Yu et al. 2010), and IMAGES adjoint CO/NOx inversions (Muller & Stavrakou 2005).
- [Aerosol Nucleation, CALIPSO Dust & Radiative Forcing](https://atmos-chemphys.net/aerosol-radiative-forcing/): Boundary-layer nucleation (Spracklen et al. 2006), organic condensation CCN links (Riipinen et al. 2011), AeroCom 1750/2000 emissions (Dentener et al. 2006), Tibetan dust lidar profiles (Liu et al. 2008), and prognostic rain microphysics (Posselt & Lohmann 2008).
- [Emissions Inventories & Urban CO2 Bayesian Inversions](https://atmos-chemphys.net/emissions-inversions/): Global anthropogenic SO2 1850-2005 reconstruction (Smith et al. 2011) and Paris urban CO2 inversion gradients (Breon et al. 2015).
- [Stratospheric Dynamics & Brewer-Dobson Circulation](https://atmos-chemphys.net/stratospheric-dynamics/): Shallow vs deep residual circulation transit times and N2O-O3 diagnostics (Bonisch et al. 2011).
- [Regional Chemical Weather & PM2.5 Source Apportionment](https://atmos-chemphys.net/air-quality-forecasting/): 18 European chemical weather models (Kukkonen et al. 2012) and Beijing seasonal PM2.5 6-source PMF (Zhang et al. 2013).
- [Interactive Photochemical & Radiative Forcing Workbench](https://atmos-chemphys.net/radiative-workbench/): Client-side HCHO/NO2 sensitivity, CMAQ mechanism NMB bias, and Charlson AOD direct forcing calculator.
- [Historical Citation Crosswalk & DOI Registry](https://atmos-chemphys.net/publications-archive/): Filterable registry of all 13 verified 2005-2015 atmospheric lineages.
- [Observatory Methodology & Historical Domain Disclosure](https://atmos-chemphys.net/about/#historical-disclosure): Non-affiliation statement, domain provenance, and editorial contact (contact@atmos-chemphys.net).

## Canonical Citation Protocol
- Cite primary peer-reviewed DOIs on acp.copernicus.org (`10.5194/acp-*`) for formal scholarly attribution.
- Legacy URLs under `/12/6291/2012/...`, `/15/1707/2015/...`, `/11/1101/2011/...`, `/10/3001/2010/...`, and `/11/3937/2011/...` resolve via single-hop HTTP 301 to `#archive-*` records on the matching topical hub.