Jan Wohland

• Richards, Thomas; Zeyringer, Marianne; Wohland, Jan; Young, Petrus; Randle-Boggis, Richard & Price, James (2026). Dual-Use Solar Strategies: Modelling LandConstrained PV Deployment in Europe. I 2026, EEM (Red.), 2026 22nd International Conference on the European Energy Market - EEM. IEEE (Institute of Electrical and Electronics Engineers). ISSN 9798319535542. doi: 10.1109/EEM68581.2026.11589793. Fulltekst i vitenarkiv Vis sammendrag

  Meeting Europe’s decarbonisation targets will require rapid expansion of solar PV, yet land-use conflicts and biodiversity protection increasingly constrain where ground mounted systems can be deployed. This paper uses the highRES electricity system model to assess how progressively stricter biodiversity protection affects solar deployment across Europe and to evaluate the economic conditions under which agrivoltaics can emerge as a viable dual land-use alternative. Results show that even stringent land-use exclusions leave sufficient unconstrained land for ground-mounted PV at system scale, though this reflects an idealised setting without competing non-energy land demands. Agrivoltaics become cost competitive only after substantial CAPEX reductions or when supported by significant agricultural co-benefits. These findings highlight the need to integrate land-use protection, renewable energy planning, and agricultural policy to enable land efficient solar expansion.

• Wohland, Jan (2026). Climate Change and Energy Systems: When do signals emerge from the noise? International Conference on the European Energy Market. ISSN 2165-4077. doi: 10.1109/EEM68581.2026.11589803. Fulltekst i vitenarkiv
• Wohland, Jan; Hoffmann, Peter; Lima, Daniela C. A.; Breil, Marcus; Asselin, Olivier & Rechid, Diana (2024). Extrapolation is not enough: impacts of extreme land use change on wind profiles and wind energy according to regional climate models. Earth System Dynamics (ESD). ISSN 2190-4979. 15(6), s. 1385–1400. doi: 10.5194/esd-15-1385-2024. Fulltekst i vitenarkiv Vis sammendrag

  Humans change climate in many ways. In addition to greenhouse gases, climate models must therefore incorporate a range of other forcings, such as land use change. While studies typically investigate the joint effects of all forcings, here we isolate the impact of afforestation and deforestation on winds in the lowermost 350 m of the atmosphere to assess the relevance of land use change for large-scale wind energy assessments. We use vertically resolved sub-daily output from two regional climate models instead of extrapolating near-surface winds with simplified profiles. Comparing two extreme scenarios, we report that afforestation reduces wind speeds by more than 1 m s−1 in many locations across Europe, even 300 m above ground, underscoring its relevance at hub heights of current and future wind turbines. We show that standard extrapolation with modified parameters approximates long-term means well but fails to capture essential spatio-temporal details, such as changes in the daily cycle, and it is thus insufficient to estimate wind energy potentials. Using adjacent climate model levels to account for spatio-temporal wind profile complexity, we report that wind energy capacity factors are strongly impacted by afforestation and deforestation: they differ by more than 0.1 in absolute terms and up to 50 % in relative terms. Our results confirm earlier studies showing that land use change impacts on wind energy can be severe and that they are generally misrepresented with common extrapolation techniques.

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