update co2 targets with EEA historical values and projections (#266)

* update co2 targets  with EEA historical values and projections

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

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: lindnemi

config/config.yaml

@@ -238,11 +238,11 @@ clustering:
 
 # docs in https://pypsa-eur.readthedocs.io/en/latest/configuration.html#co2-budget
 co2_budget:
-  2020: 0.800 # 20% reduction by 2020
-  2025: 0.620
+  2020: 0.720 # average emissions of 2019 to 2021 relative to 1990, 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 # goal to be set next year
+  2040: 0.100 # 90% by 2040
   2045: 0.050
   2050: 0.000 # climate-neutral by 2050
 

config/scenarios.manual.yaml

@@ -15,13 +15,13 @@ CurrentPolicies:
   co2_budget_DE_source: UBA
 
   co2_budget:
-    2020: 0.800 # 20% reduction by 2020
-    2025: 0.620
-    2030: 0.500 # less than 55% reduction by 2030 (Ff55)
-    2035: 0.450 # stagnation for the Trend scenario
-    2040: 0.450
-    2045: 0.450
-    2050: 0.450
+    2020: 0.720 # average emissions of 2019 to 2021 relative to 1990, 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: 0.675 # With existing measures (WEM) 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: 0.569
+    2035: 0.502
+    2040: 0.452
+    2045: 0.431
+    2050: 0.419
 
   costs:
     horizon: "mean"
@@ -489,13 +489,13 @@ KN2045minus_WorstCase:
   co2_budget_DE_source: UBA
 
   co2_budget:
-    2020: 0.800 # 20% reduction by 2020
-    2025: 0.620
-    2030: 0.500 # less than 55% reduction by 2030 (Ff55)
-    2035: 0.450 # stagnation of CO2 reduction
-    2040: 0.450
-    2045: 0.450
-    2050: 0.450
+    2020: 0.720 # average emissions of 2019 to 2021 relative to 1990, 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: 0.675 # With existing measures (WEM) 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: 0.569
+    2035: 0.502
+    2040: 0.452
+    2045: 0.431
+    2050: 0.419
 
   costs:
     horizon: "pessimist"
@@ -602,13 +602,13 @@ KN2045minus_SupplyFocus:
   co2_budget_DE_source: UBA
 
   co2_budget:
-    2020: 0.800 # 20% reduction by 2020
-    2025: 0.620
-    2030: 0.500 # less than 55% reduction by 2030 (Ff55)
-    2035: 0.450 # stagnation of CO2 reduction
-    2040: 0.450
-    2045: 0.450
-    2050: 0.450
+    2020: 0.720 # average emissions of 2019 to 2021 relative to 1990, 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: 0.675 # With existing measures (WEM) 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: 0.569
+    2035: 0.502
+    2040: 0.452
+    2045: 0.431
+    2050: 0.419
   solving:
     constraints:
       # boundary condition of maximum volumes