Comparing lake sediment records of landscape macronutrient loadings with N14CP model simulations: 200 years of change in British lakes



Boyle, John, Tipping, Ed ORCID: 0000-0001-6618-6512, Davies, Jess, Rose, Neil ORCID: 0000-0002-5697-7334, Turner, Simon, Toberman, Hannah, Schillereff, Dan ORCID: 0000-0002-4928-6068 and Chiverrell, Richard
(2020) Comparing lake sediment records of landscape macronutrient loadings with N14CP model simulations: 200 years of change in British lakes. .

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Abstract

<jats:p> &amp;lt;p&amp;gt;To fully understand coupling between P and other macronutrients it is necessary to have both long-term data sets and process models, combining empirical reality with numerical simulation of coupling processes. Here, lake sediment records of N and P from four UK lakes are compared with model output from N14CP, a long-term, large-scale model of cycling and export of macronutrients from the landscape. The sediment records at the three lakes that have substantial lowland contributions reveal strongly increasing N and P loading through the late 19&amp;lt;sup&amp;gt;th&amp;lt;/sup&amp;gt; century, with steady increases through the twentieth century. Corresponding changes in N and C isotopes are observed. However, the one mountain lake show maximum N and P loadings in the 19&amp;lt;sup&amp;gt;th&amp;lt;/sup&amp;gt; century, with declines through the twentieth, consistent with a wholly different land use history. The N14CP model shows N and P increasing from mid 19&amp;lt;sup&amp;gt;th&amp;lt;/sup&amp;gt; century for average lowland sites, in agreement with the lowland sediment records. The implications of these results for our knowledge about the history of P and N coupling and leaching from UK soils are discussed.&amp;lt;/p&amp;gt; </jats:p>

Item Type: Conference or Workshop Item (Unspecified)
Depositing User: Symplectic Admin
Date Deposited: 07 Apr 2020 10:19
Last Modified: 12 Aug 2021 07:10
DOI: 10.5194/egusphere-egu2020-9968
Open Access URL: https://meetingorganizer.copernicus.org/EGU2020/EG...
URI: https://livrepository.liverpool.ac.uk/id/eprint/3082249