diff --git a/.buildlibrary b/.buildlibrary
index 733ca63f..be9ffb40 100644
--- a/.buildlibrary
+++ b/.buildlibrary
@@ -1,4 +1,4 @@
-ValidationKey: '43610700'
+ValidationKey: '43822590'
 AutocreateReadme: yes
 AutocreateCITATION: yes
 AcceptedWarnings:
diff --git a/CITATION.cff b/CITATION.cff
index a95c8122..38c6fc37 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -2,8 +2,8 @@ cff-version: 1.2.0
 message: If you use this software, please cite it using the metadata from this file.
 type: software
 title: 'mrmfa: Input data generation for the REMIND MFA'
-version: 2.10.0
-date-released: '2026-11-10'
+version: 2.11.0
+date-released: '2026-11-12'
 abstract: The mrmfa packages contains data preprocessing for the REMIND MFA.
 authors:
 - family-names: Dürrwächter
diff --git a/DESCRIPTION b/DESCRIPTION
index 60016b1a..81b3dd04 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Type: Package
 Package: mrmfa
 Title: Input data generation for the REMIND MFA
-Version: 2.10.0
-Date: 2026-11-10
+Version: 2.11.0
+Date: 2026-11-12
 Authors@R: c(
     person("Jakob", "Dürrwächter", , "jakobdu@pik-potsdam.de", role = c("aut", "cre")),
     person("Bennet", "Weiss", , "bennet.weiss@pik-potsdam.de", role = "aut"),
diff --git a/R/calcCoScalars.R b/R/calcCoScalars.R
new file mode 100644
index 00000000..b2152266
--- /dev/null
+++ b/R/calcCoScalars.R
@@ -0,0 +1,36 @@
+#' Collect scalar parameters
+#'
+#' @description
+#' Stores named scalar values (e.g. the start and end years of the model time
+#' periods) in a magpie object, so that they can be written to a file via
+#' calcOutput. Written as .cs4r, each line has the form \code{name,value}.
+#'
+#' @author Jakob Dürrwächter
+#' @param scalars Named numeric vector, e.g.
+#' \code{c(start_historical = 1900, end_historical = 2022, end_future = 2150)}.
+#' @param unit Unit of the scalars.
+#' @return List with magpie object of the scalars and metadata in calcOutput format.
+#' @examples
+#' \dontrun{
+#' calcOutput("CoScalars", scalars = c(start_historical = 1900, end_historical = 2022),
+#'            file = "st_scalars.cs4r", aggregate = FALSE)
+#' }
+calcCoScalars <- function(scalars, unit = "various") {
+  if (!is.numeric(scalars) || length(scalars) == 0) {
+    stop("scalars must be a non-empty numeric vector.")
+  }
+  if (is.null(names(scalars)) || any(names(scalars) == "") || anyDuplicated(names(scalars))) {
+    stop("All scalars must have unique, non-empty names.")
+  }
+
+  x <- new.magpie(names = names(scalars), fill = unname(scalars), sets = c("region", "year", "scalar"))
+
+  return(list(
+    x = x,
+    weight = NULL,
+    unit = unit,
+    isocountries = FALSE,
+    description = paste0("Scalar parameters: ", paste(names(scalars), collapse = ", ")),
+    note = "dimensions: (scalar,value)"
+  ))
+}
diff --git a/R/fullMFA.R b/R/fullMFA.R
index 87444fd2..3350269b 100644
--- a/R/fullMFA.R
+++ b/R/fullMFA.R
@@ -47,6 +47,9 @@ fullMFA <- function(rev = 0,
     start_historical <- 1900
     end_historical <- 2022
 
+    calcOutput("CoScalars", file = "st_time_range.cs4r", aggregate = FALSE, unit = "year",
+               scalars = c(start_historical = start_historical, end_historical = end_historical, end_future = end_future))
+
     # common parameters
     calcOutput("CoPopulation", file = "st_population.cs4r", scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
     calcOutput("CoGDP", file = "st_gdppc.cs4r", perCapita = gdpPerCapita, scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
@@ -97,6 +100,9 @@ fullMFA <- function(rev = 0,
     start_historical <- 1880
     end_historical <- 2025
 
+    calcOutput("CoScalars", file = "ce_time_range.cs4r", aggregate = FALSE, unit = "year",
+               scalars = c(start_historical = start_historical, end_historical = end_historical, end_future = end_future))
+
     # common parameters
     calcOutput("CoPopulation", file = "ce_population.cs4r", scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
     calcOutput("CoGDP", file = "ce_gdppc.cs4r", perCapita = gdpPerCapita, scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
@@ -146,6 +152,9 @@ fullMFA <- function(rev = 0,
     start_historical <- 1950
     end_historical <- 2024
 
+    calcOutput("CoScalars", file = "pl_time_range.cs4r", aggregate = FALSE, unit = "year",
+               scalars = c(start_historical = start_historical, end_historical = end_historical, end_future = end_future))
+
     # common parameters
     calcOutput("CoPopulation", file = "pl_population.cs4r", scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
     calcOutput("CoGDP", file = "pl_gdppc.cs4r", perCapita = gdpPerCapita, scenarios = driverScenarios, collapse = FALSE, smooth = TRUE, years = start_historical:end_future)
diff --git a/README.md b/README.md
index 32c6b025..a353b073 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Input data generation for the REMIND MFA
 
-R package **mrmfa**, version **2.10.0**
+R package **mrmfa**, version **2.11.0**
 
    [![R build status](https://github.com/pik-piam/mrmfa/workflows/check/badge.svg)](https://github.com/pik-piam/mrmfa/actions) [![codecov](https://codecov.io/gh/pik-piam/mrmfa/branch/master/graph/badge.svg)](https://app.codecov.io/gh/pik-piam/mrmfa) 
 
@@ -38,7 +38,7 @@ In case of questions / problems please contact Jakob Dürrwächter <jakobdu@pik-
 
 To cite package **mrmfa** in publications use:
 
-Dürrwächter J, Weiss B, Schweiger L, Benke F, Diez T, Hosak M, Zhang Q (2026). "mrmfa: Input data generation for the REMIND MFA." Version: 2.10.0, <https://github.com/pik-piam/mrmfa>.
+Dürrwächter J, Weiss B, Schweiger L, Benke F, Diez T, Hosak M, Zhang Q (2026). "mrmfa: Input data generation for the REMIND MFA." Version: 2.11.0, <https://github.com/pik-piam/mrmfa>.
 
 A BibTeX entry for LaTeX users is
 
@@ -46,9 +46,9 @@ A BibTeX entry for LaTeX users is
 @Misc{,
   title = {mrmfa: Input data generation for the REMIND MFA},
   author = {Jakob Dürrwächter and Bennet Weiss and Leonie Schweiger and Falk Benke and Tobias Diez and Merlin Jo Hosak and Qianzhi Zhang},
-  date = {2026-11-10},
+  date = {2026-11-12},
   year = {2026},
   url = {https://github.com/pik-piam/mrmfa},
-  note = {Version: 2.10.0},
+  note = {Version: 2.11.0},
 }
 ```
diff --git a/man/calcCoScalars.Rd b/man/calcCoScalars.Rd
new file mode 100644
index 00000000..2e1f4cb8
--- /dev/null
+++ b/man/calcCoScalars.Rd
@@ -0,0 +1,31 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/calcCoScalars.R
+\name{calcCoScalars}
+\alias{calcCoScalars}
+\title{Collect scalar parameters}
+\usage{
+calcCoScalars(scalars, unit = "various")
+}
+\arguments{
+\item{scalars}{Named numeric vector, e.g.
+\code{c(start_historical = 1900, end_historical = 2022, end_future = 2150)}.}
+
+\item{unit}{Unit of the scalars.}
+}
+\value{
+List with magpie object of the scalars and metadata in calcOutput format.
+}
+\description{
+Stores named scalar values (e.g. the start and end years of the model time
+periods) in a magpie object, so that they can be written to a file via
+calcOutput. Written as .cs4r, each line has the form \code{name,value}.
+}
+\examples{
+\dontrun{
+calcOutput("CoScalars", scalars = c(start_historical = 1900, end_historical = 2022),
+           file = "st_scalars.cs4r", aggregate = FALSE)
+}
+}
+\author{
+Jakob Dürrwächter
+}