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erikvansebille merged 2 commits into from
Dec 22, 2025
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fix formatting in dt guide and interpolators guide #2441

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a19e8c8
fix formatting in dt guide and interpolators guide
Dec 19, 2025
8370e81
Update section headers
erikvansebille Dec 22, 2025
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2 changes: 1 addition & 1 deletion docs/user_guide/examples/tutorial_dt_integrators.ipynb
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Expand Up @@ -154,7 +154,7 @@
"\n",
"$$\n",
"\\begin{aligned}\n",
"\\text{d}t < \\frac{1}{12 * 1.71e-5} = 4.9e3 \\text{ seconds}\n",
"\\text{d}t < \\frac{1}{12 * 1.71 * 10^{-5}} = 4.9* 10^{3} \\text{ seconds}\n",
"\\end{aligned}\n",
"$$\n",
"\n",
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38 changes: 20 additions & 18 deletions docs/user_guide/examples/tutorial_interpolation.ipynb
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Expand Up @@ -6,9 +6,7 @@
"metadata": {},
"source": [
"# 🖥️ Using `parcels.interpolators`\n",
"Parcels comes with a number of different interpolation methods for tracer fields, such as temperature. Here, we will look at a few common `parcels.interpolators` for structured (`X`) grids, and how to configure them in an idealised example. For more guidance on the sampling of such fields, check out the [sampling tutorial](./tutorial_sampling).\n",
"\n",
"We first import the relevant modules"
"Parcels comes with a number of different interpolation methods for fields on structured (`X`) and unstructured (`Ux`) grids. Here, we will look at a few common {py:obj}`parcels.interpolators` for tracer fiedls, and how to configure them in an idealised example. For more guidance on the sampling of such fields, check out the [sampling tutorial](./tutorial_sampling)."
]
},
{
Expand All @@ -24,6 +22,14 @@
"import parcels"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Interpolators on structured grids\n",
"We will first look at interpolation schemes which work on tracer fields defined on {py:obj}`parcels.XGrid` objects."
]
},
{
"attachments": {},
"cell_type": "markdown",
Expand Down Expand Up @@ -53,7 +59,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"From this dataset we create a `parcels.FieldSet`. Parcels requires an interpolation method to be set for each `parcels.Field`, which we will later adapt to see the effects of the different interpolators. A common interpolator for fields on structured grids is (tri)linear, implemented in `parcels.interpolators.XLinear`."
"From this dataset we create a {py:obj}`parcels.FieldSet`. Parcels requires an interpolation method to be set for each {py:obj}`parcels.Field`, which we will later adapt to see the effects of the different interpolators. A common interpolator for fields on structured grids is (tri)linear, implemented in {py:obj}`parcels.interpolators.XLinear`."
]
},
{
Expand Down Expand Up @@ -230,15 +236,11 @@
"\n",
"In the special case where a `parcels.Field` is constant in time and space, such as implementing constant diffusion on a spherical mesh, we can use:\n",
"\n",
"5. `interp_method=parcels.interpolators.XConstantField`: return single value of a Constant Field"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"```{note}\n",
"TODO: link to reference API with all `parcels.interpolators`\n",
"5. `interp_method=parcels.interpolators.XConstantField`: return single value of a Constant Field\n",
"\n",
"```{admonition} [..] API reference\n",
":class: seealso\n",
"All available interpolation methods are listed here: {py:obj}`parcels.interpolators`\n",
"```"
]
},
Expand All @@ -249,14 +251,14 @@
"### Interpolation at boundaries\n",
"In some cases, we need to implement specific boundary conditions, for example to prevent particles from \n",
"getting \"stuck\" near land. [This guide](../examples_v3/documentation_unstuck_Agrid.ipynb) describes \n",
"how to implement this in parcels using `parcels.interpolators.XFreeslip` and `parcels.interpolators.XPartialslip`."
"how to implement this in parcels using {py:obj}`parcels.interpolators.XFreeslip` and {py:obj}`parcels.interpolators.XPartialslip`."
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Interpolation on unstructured grids\n",
"## Interpolators on unstructured grids\n",
"Parcels v4 supports the use of general circulation model output that is defined on unstructured grids. We include basic interpolators to help you get started, including\n",
"- `UxPiecewiseConstantFace` - this interpolator implements piecewise constant interpolation and is appropriate for data that is registered to the face centers of the unstructured grid\n",
"- `UxPiecewiseLinearNode` - this interpolator implements barycentric interpolation and is appropriate for data that is registered to the corner vertices of the unstructured grid faces\n",
Expand All @@ -280,7 +282,7 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Next, we create the `Field` and `Fieldset` objects that will be used later in advancing particles. When creating a `Field` or `VectorField` object for unstructured grid data, we attach a `parcels.UxGrid` object and attach an `interp_method` to each object. For data that is defined on face centers, we use the `UxPiecewiseConstantFace` interpolator and for data that is defined on the face vertices, we use the `UxPiecewiseLinearNode` interpolator. In this example, we will look specifically at interpolating a tracer field that is defined by the same underlying analytical function, but is defined on both faces and vertices as separate fields."
"Next, we create the `Field` and `Fieldset` objects that will be used later in advancing particles. When creating a `Field` or `VectorField` object for unstructured grid data, we attach a {py:obj}`parcels.UxGrid` object and attach an `interp_method` to each object. For data that is defined on face centers, we use the `UxPiecewiseConstantFace` interpolator and for data that is defined on the face vertices, we use the `UxPiecewiseLinearNode` interpolator. In this example, we will look specifically at interpolating a tracer field that is defined by the same underlying analytical function, but is defined on both faces and vertices as separate fields."
]
},
{
Expand Down Expand Up @@ -494,7 +496,7 @@
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "test-notebooks",
"language": "python",
"name": "python3"
},
Expand All @@ -508,7 +510,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.12.11"
"version": "3.13.9"
}
},
"nbformat": 4,
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