This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Plymouth Cruise Ship version of Plume Plotter.
The following values are used for albedo, Bowen ratio and roughness length:
The emissions are based on a typical mid-size cruise ship of the type expected to visit Plymouth in 2022. A hotel power requirement of 4MW is representative with machinery meeting IMO Tier 1 emission standard (for ships built after 2011, NOx levels will be 15% lower). NOx and particulates levels are based on studies of cruise ships berthed at cruise ship terminals.
The emission rates of pollutants are listed below:
| Pollutant | Emission rate per second |
|---|---|
| Oxides of nitrogen | 15 g |
| Particulates PM10 | 610 mg |
| Sulphur dioxide | N/A |
| TOC | N/A |
| Carbon monoxide | N/A |
| Hydrogen chloride | N/A |
| Hydrogen flouride | N/A |
| Ammonia | N/A |
| Cadmium and thallium | N/A |
| Mercury | N/A |
| Arsenic | N/A |
| Chromium | N/A |
| Nickel | N/A |
| Other metals | N/A |
| Dioxins and furans | N/A |
| PAH | N/A |
| PCBs | N/A |
The background levels of pollutants are taken from [1]:
| Pollutant | Background concentration per m3 |
|---|---|
| Oxides of nitrogen | 15.3 μg |
| Particulates PM10 | 13.3 μg |
| Sulphur dioxide | 7.1 μg |
| TOC | 330 ng |
| Carbon monoxide | 134 μg |
| Hydrogen chloride | 410 ng |
| Hydrogen flouride | 3 ng |
| Ammonia | 1 μg |
| Cadmium and thallium | 90 pg |
| Mercury | 10 pg |
| Arsenic | 410 pg |
| Chromium | 520 pg |
| Nickel | 1.96 ng |
| Other metals | 10.68 ng |
| Dioxins and furans | 8.5 fg |
| PAH | 121 pg |
| PCBs | 1.724 ng |
Weather data is taken from a local synoptic weather station: Plymouth Mountbatten.
Upper air data is the latest reported by the Camborne upper air station.