diff --git a/docs/src/changelog.md b/docs/src/changelog.md
index 710cbbf13..f8f661a17 100644
--- a/docs/src/changelog.md
+++ b/docs/src/changelog.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   to zero).
 - In the grid output netCDFs, don't set the `_FillValue` attribute, since the CF conventions
   don't allow it.
+- Glacier parameter `g_sifrac` needs to be converted during initialization (time dependent).
 
 ### Changed
 - Changed depth `h` for reservoir and lake locations as part of the river local inertial
diff --git a/docs/src/model_docs/params_vertical.md b/docs/src/model_docs/params_vertical.md
index 19b2c1f1c..d8f3033e0 100644
--- a/docs/src/model_docs/params_vertical.md
+++ b/docs/src/model_docs/params_vertical.md
@@ -27,7 +27,7 @@ specific_leaf = "Sl"
 | **`cf_soil`**  | controls soil infiltration reduction factor when soil is frozen  | - | 0.038  |
 | **`g_tt`**  | threshold temperature for snowfall above glacier  | ᵒC| 0.0  |
 | **`g_cfmax`**  | Degree-day factor for glacier  | mm ᵒC``^{-1}`` Δt``^{-1}``| 3.0 mm ᵒC``^{-1}`` day``^{-1}`` |
-| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | - | 0.001  |
+| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | Δt``^{-1}`` | 0.001 day``^{-1}`` |
 | **`glacierfrac`**  | fraction covered by a glacier | - | 0.0  |
 | **`glacierstore`**  | water within the glacier  | mm | 5500.0  |
 | **`θₛ`** (`theta_s`) | saturated water content (porosity) | - | 0.6  |
@@ -134,7 +134,7 @@ internal model parameter to the external netCDF variable.
 | **`whc`**  | water holding capacity as fraction of current snow pack  | - | 0.1  |
 | **`g_tt`**  | threshold temperature for snowfall above glacier  | ᵒC| 0.0  |
 | **`g_cfmax`**  | Degree-day factor for glacier  | mm ᵒC``^{-1}`` Δt``^{-1}``| 3.0 mm ᵒC``^{-1}`` day``^{-1}`` |
-| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | - | 0.001  |
+| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | Δt``^{-1}``| 0.001 day``^{-1}`` |
 | **`glacierfrac`**  | fraction covered by a glacier | - | 0.0  |
 | **`glacierstore`**  | water within the glacier  | mm | 5500.0  |
 | **`fc`**  | field capacity  | mm | 260.0  |
@@ -199,7 +199,7 @@ internal model parameter to the external netCDF variable.
 | **`cfr`**  | refreezing efficiency constant in refreezing of freewater in snow | - | 0.05  |
 | **`g_tt`**  | threshold temperature for snowfall above glacier  | ᵒC| 0.0  |
 | **`g_cfmax`**  | Degree-day factor for glacier  | mm ᵒC``^{-1}`` Δt``^{-1}``| 3.0 mm ᵒC``^{-1}`` day``^{-1}`` |
-| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | - | 0.001  |
+| **`g_sifrac`**  | fraction of the snowpack on top of the glacier converted into ice  | Δt``^{-1}`` | 0.001 day``^{-1}`` |
 | **`glacierfrac`**  | fraction covered by a glacier | - | 0.0  |
 | **`glacierstore`**  | water within the glacier  | mm | 5500.0  |
 | **`ecorr`**  | evaporation correction | - | 1.0  |
diff --git a/src/flextopo.jl b/src/flextopo.jl
index aec1bb9af..466213d04 100644
--- a/src/flextopo.jl
+++ b/src/flextopo.jl
@@ -45,8 +45,8 @@
     g_tt::Vector{T} | "ᵒC"
     # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1"
-    # Fraction of the snowpack on top of the glacier converted into ice [-]
-    g_sifrac::Vector{T} | "-"
+    # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
+    g_sifrac::Vector{T} | "Δt-1"
     # Water within the glacier [mm]
     glacierstore::Vector{T} | "mm"
     # Fraction covered by a glacier [-]
diff --git a/src/flextopo_model.jl b/src/flextopo_model.jl
index b05e08c10..0ed1ead97 100644
--- a/src/flextopo_model.jl
+++ b/src/flextopo_model.jl
@@ -93,7 +93,7 @@ function initialize_flextopo_model(config::Config)
         defaults = 0.001,
         type = Float,
         fill = 0.0,
-    )
+    ) .* (Δt / basetimestep)
     glacierfrac = ncread(
         nc,
         config,
diff --git a/src/hbv.jl b/src/hbv.jl
index b1b1443ed..b5b376d62 100644
--- a/src/hbv.jl
+++ b/src/hbv.jl
@@ -29,7 +29,7 @@
     whc::Vector{T} | "-"                # Fraction of snow volume that can store water [-]
     g_tt::Vector{T} | "ᵒC"              # Threshold temperature for snowfall above glacier [ᵒC]
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1" # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
-    g_sifrac::Vector{T} | "-"           # Fraction of the snowpack on top of the glacier converted into ice [-]
+    g_sifrac::Vector{T} | "Δt-1"        # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
     glacierstore::Vector{T} | "mm"      # Water within the glacier [mm]
     glacierfrac::Vector{T} | "-"        # Fraction covered by a glacier [-]
     precipitation::Vector{T}            # Precipitation [mm Δt⁻¹]
diff --git a/src/hbv_model.jl b/src/hbv_model.jl
index 7d21ebb6f..5cad79435 100644
--- a/src/hbv_model.jl
+++ b/src/hbv_model.jl
@@ -70,7 +70,7 @@ function initialize_hbv_model(config::Config)
         defaults = 0.001,
         type = Float,
         fill = 0.0,
-    )
+    ) .* (Δt / basetimestep)
     glacierfrac = ncread(
         nc,
         config,
diff --git a/src/sbm.jl b/src/sbm.jl
index 8bae77847..57a941e73 100644
--- a/src/sbm.jl
+++ b/src/sbm.jl
@@ -173,8 +173,8 @@
     g_tt::Vector{T} | "ᵒC"
     # Degree-day factor [mm ᵒC⁻¹ Δt⁻¹] for glacier
     g_cfmax::Vector{T} | "mm ᵒC-1 Δt-1"
-    # Fraction of the snowpack on top of the glacier converted into ice [-]
-    g_sifrac::Vector{T} | "-"
+    # Fraction of the snowpack on top of the glacier converted into ice [Δt⁻¹]
+    g_sifrac::Vector{T} | "Δt-1"
     # Water within the glacier [mm]
     glacierstore::Vector{T} | "mm"
     # Fraction covered by a glacier [-]
@@ -317,7 +317,7 @@ function initialize_sbm(nc, config, riverfrac, inds)
         defaults = 0.001,
         type = Float,
         fill = 0.0,
-    )
+    ) .* (Δt / basetimestep)
     glacierfrac = ncread(
         nc,
         config,