Deposition and concentration of nitrogen and sulphur for protected sites in the UK, 2017-2019

This dataset provides values of sulphur and nitrogen deposition, deposition of non-marine base cations and concentration values for ammonia (NH3), sulphur dioxide (SO2) and nitrogen oxide (NOx) on the UK nature conservation protected sites, averaged over the years 2017 to 2019. The dataset also includes calculated minimum, maximum and gridded average values for each site. Protected nature sites covered are:
(i) Special Areas of Conservation (SAC)
(ii) Special Protection Areas (SPA)
(iii) Sites of Special Scientific Interest (SSSI).

The data consist of values of nitrogen and acid deposition, non-marine base cation deposition, and concentrations of ammonia (NH3) based on the Concentration Based Estimated Deposition (CBED), and concentrations of NOx and SO2 using the Pollution Climate Mapping (PCM) model.
Nitrogen and acid deposition data is also given for specific habitat types including:
(i) moorland/short vegetation everywhere,
(ii) forest everywhere, and
(iii) the grid square average over multiple land cover types (i.e. arable, grassland, forest, moorland, urban)

These habitat-specific data are recommended for use with critical loads for the calculation of critical load exceedances using the relevant deposition/habitat type.

该数据集提供了英国自然保护地的硫与氮沉降、非海洋基阳离子沉降的值，以及氨（NH₃）、二氧化硫（SO₂）和氮氧化物（NOₓ）的浓度值，数据为2017至2019年的平均值。数据集还包含各保护地的计算所得最小值、最大值及网格平均值。涵盖的自然保护地类型如下：
(i) 特殊保护区域（Special Areas of Conservation, SAC）
(ii) 特殊保护区（Special Protection Areas, SPA）
(iii) 特殊科学兴趣地（Sites of Special Scientific Interest, SSSI）

数据包含氮与酸沉降、非海洋基阳离子沉降的值，以及基于浓度估算沉降（Concentration Based Estimated Deposition, CBED）模型的氨（NH₃）浓度，和采用污染气候映射（Pollution Climate Mapping, PCM）模型的氮氧化物（NOₓ）与二氧化硫（SO₂）浓度。

数据集还提供了特定栖息地类型的氮与酸沉降数据，包括：
(i) 各地的荒地/矮植被
(ii) 各地的森林
(iii) 多种土地覆盖类型（即耕地、草地、森林、荒地、城市用地）的网格平方平均值

这些栖息地特异性数据建议与临界负荷结合使用，以通过相关沉降/栖息地类型计算临界负荷超标情况。