update co2_budget (#1399)

* update co2_budget

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: Fabian Neumann <fabian.neumann@outlook.de>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

config/config.default.yaml

@@ -72,13 +72,13 @@ enable:
 
 # docs in https://pypsa-eur.readthedocs.io/en/latest/configuration.html#co2-budget
 co2_budget:
-  2020: 0.701
-  2025: 0.524
-  2030: 0.297
-  2035: 0.150
-  2040: 0.071
-  2045: 0.032
-  2050: 0.000
+  2020: 0.720 # average emissions of 2019 to 2021 relative to 1990, CO2 excl LULUCF, EEA data, European Environment Agency. (2023a). Annual European Union greenhouse gas inventory 1990–2021 and inventory report 2023 - CRF Table. https://unfccc.int/documents/627830
+  2025: 0.648 # With additional measures (WAM) projection, CO2 excl LULUCF, European Environment Agency. (2023e). Member States’ greenhouse gas (GHG) emission projections 2023. https://www.eea.europa.eu/en/datahub/datahubitem-view/4b8d94a4-aed7-4e67-a54c-0623a50f48e8
+  2030: 0.450 # 55% reduction by 2030 (Ff55)
+  2035: 0.250
+  2040: 0.100 # 90% by 2040
+  2045: 0.050
+  2050: 0.000 # climate-neutral by 2050
 
 # docs in https://pypsa-eur.readthedocs.io/en/latest/configuration.html#electricity
 electricity:

rules/retrieve.smk

@@ -690,4 +690,3 @@ if config["enable"]["retrieve"]:
                     with open(output_path, "wb") as f:
                         f.write(response.content)
 
-