Chemistry Reference
In-Depth Information
Fig. 7 Ammonia emission distributions from Denmark, reproduced from Geels et al. [
80
]
depositions of reactive nitrogen [
13
]. A similar geographical pattern with high
diversity and tight connection between emissions and depositions in the high-
emission areas is found in many areas of Europe including Denmark [
10
,
80
], the
Netherlands [
78
], Belgium as well as parts of France, Germany and Poland [
77
].
High-resolution emission inventories are available from the UK [
13
,
81
], Denmark
[
15
,
80
], Switzerland [
82
] and the Netherlands [
83
]. Emissions are in general among
the most important input to all CTMs and have therefore received much attention
[
5
,
48
]. Despite this, emission data is considered the largest uncertainty factor in the
description of N loadings of sensitive terrestrial ecosystems [
5
] and similarly an
important component among feedback mechanisms in the climate system [
11
].
Figure
7
shows the high-resolution emission distributions derived for Denmark.
The geographical distributions reflect in general the location of the most intensive
agricultural areas that constitute the largest NH
3
sources.
The relative national distribution in NH
3
emission between the agricultural
source categories for selected European countries is shown in Fig.
8
. The figure
illustrates the vast differences between countries relating to differences in climate
as well as agricultural practice.
