Report from a construction site. Ulrich Dämmgen, Manfred Lüttich and Hans-Dieter Haenel

Transcription

1 Emissions. atmospheric concentrations and bulk deposition of reduced nitrogen in Hesse. Germany steps towards a comprehensive treatment of reactive nitrogen in the atmosphere Report from a construction site Ulrich Dämmgen, Manfred Lüttich and Hans-Dieter Haenel Federal Agricultural Research Centre Institute of Agroecology Braunschweig, Germany 1

2 The reason We felt that the chain needs more attention for reduced nitrogen! 2

3 Project Partners Hessian Agency for the Environment and Geology (HLUG) (money, sampling) Federal Ministry for Food, Agriculture and Consumer Protection (BMELV) (money) Federal Environmental Agency (UBA) (money) Association for Technology and Structures in Agriculture (KTBL) (survey of agricultural activities) Justus Liebig University, Giessen, Institute of Plant Ecology (SVAT model) Energy Research Centre of the Netherlands, Petten (ECN) (transmission model) Institute of Agroecology, Federal Agricultural Research Centre (the rest) 3

4 Why? Primary goal: Establish a methodology which gets close to for reduced nitrogen. What goes in must come out! 4

5 Where? 4

6 First steps create an adequate emission inventory gather appropriate data sets 5

7 First steps create an adequate emission inventory gather appropriate data sets measure NH 3 concentrations for validation 7

8 First steps create an adequate emission inventory gather appropriate data sets measure NH 3 concentrations for validation measure bulk deposition adequately create adequate SVAT model measure relevant concentrations of gases and particles 8

9 Emissions - methods Model used: Type: Resolution: Emissions: GAS-EM mass flow model (animal numbers, feed, performance, grazing time and intensity, housing type, storage type, application type, incorporation time) districts, 1 a NH 3, N 2 O, NO, N 2, CH 4, NMVOC, PM Year considered:

10 The mass flow approach for mammals including all nitrogen species The general procedure Emissions: m excreted m bedding all N species NH 3 only N deposited during grazing N deposited in yards N deposited in house N org urine N faecal N urine N faecal N urine N faecal N E yards E house TAN N org Yards, milking parlour m yord, TAN m storage, org m house, TAN m house, org E storage m storage, TAN NH3 House Treatment and Storage N 2 O, NO N 2 O, NO, N 2 nitrification denitrification E applic Grazing m applic, org m applic, TAN E soil Application E graz To soil m graz, TAN m graz, org m returned, org m returned, TAN To soil 10

11 Emissions - results Emission explained (emission densities in kg ha -1 a -1 NH 3, results for 2003) 11

12 Emissions - results Emission densities in kg ha -1 a -1 NH 3 regional distribution (2003) (red: urban districts) 12

13 KAPS Denuder filter equipment at Linden (NH 3, HNO 3, SO 2, NH 4, NO 3, SO 4 ) Concentrations methods and locations all other sites IVL passiv samplers (NH 3 ) 13

14 Concentrations - results of denuder/filter measurements Weekly means (days and nights, two replicates) at Linden Mean concentrations (µg m -3 ) NH HNO SO NH NO SO Cl

15 Concentrations - results of denuder/filter measurements Annual variation of NH 3 and NH 4 -N concentrations NH 3 NH 4 -N 15

16 Concentrations results of passive monitoring Mean concentrations obtained using passive samplers (µg m -3 NH 3 ) all data, 2002 to 2004 (1,4): 2004 only 16

17 Depositions methods and locations Three pairs of stabilized samplers at each location monthly sampling 2002 to

18 NH4-N bulk deposition (kg ha -1 a -1 NH 4 -N) 2002 to

19 precipitation and deposition NH 4 -N bulk deposition Deposition: R 2 = 0.08; concentration: R 2 =

20 any relations? (1) emission and deposition (related to districts, 2003) Deposition: R 2 =

21 any relations? (2) emission and concentration (related to districts, 2003) Concentration: R 2 =

22 Next steps - write a detailed report - give the data to the modellers (and watch them play and relax) 22

23 Thank you for your attention 23