easyclimate.field.teleconnection.index_cgt¶

Circumglobal teleconnection pattern (CGT) Index

Functions¶

`calc_index_CGT_1point_Ding_Wang_2005`(, lon_dim, ...)	The calculation of monthly mean circumglobal teleconnection pattern (CGT) index is constructed by following method:
`calc_index_CGT_NH_Ding_Wang_2005`(, lon_dim, lat_dim, ...)	The calculation of monthly mean circumglobal teleconnection pattern (CGT) index using Ding, Q., & Wang, B. (2005) method

Module Contents¶

easyclimate.field.teleconnection.index_cgt.calc_index_CGT_1point_Ding_Wang_2005(z200_monthly_data: xarray.DataArray, time_range: slice = slice(None, None), lon_dim: str = 'lon', lat_dim: str = 'lat', time_dim: str = 'time', normalized: bool = True) → xarray.DataArray¶

The calculation of monthly mean circumglobal teleconnection pattern (CGT) index is constructed by following method:

Z200 anomalies averaged over the area (\(\mathrm{ 35 ^{\circ}N - 40 ^{\circ}N; 60^{\circ}-70^{\circ}E }\)).

Parameters¶

z200_monthly_data: xarray.DataArray.: The monthly 200-hPa geopotential height.
time_range: slice, default: slice(None, None).: The time range of seasonal cycle means to be calculated. The default value is the entire time range.
lon_dim: str, default: lon.: Longitude coordinate dimension name. By default extracting is applied over the lon dimension.
lat_dim: str, default: lat.: Latitude coordinate dimension name. By default extracting is applied over the lat dimension.
time_dim: str, default: time.: The time coordinate dimension name.
normalized: bool, default True, optional.: Whether to standardize the index based on standard deviation over time_range.

Returns¶

The monthly mean CGT index (xarray.DataArray).

Reference¶

easyclimate.field.teleconnection.index_cgt.calc_index_CGT_NH_Ding_Wang_2005(z200_monthly_data: xarray.DataArray, output_freq: Literal['monthly', 'seasonally'], time_range: slice = slice(None, None), lon_dim: str = 'lon', lat_dim: str = 'lat', lat_range: slice = slice(20, 85), time_dim: str = 'time') → xarray.DataArray¶

The calculation of monthly mean circumglobal teleconnection pattern (CGT) index using Ding, Q., & Wang, B. (2005) method

Parameters¶

z200_monthly_data: xarray.DataArray.: The monthly 200-hPa geopotential height.
output_freq: str.: The output frequency. Optional values are monthly, seasonally.
time_range: slice, default: slice(None, None).: The time range of seasonal cycle means to be calculated. The default value is the entire time range.
lon_dim: str, default: lon.: Longitude coordinate dimension name. By default extracting is applied over the lon dimension.
lat_dim: str, default: lat.: Latitude coordinate dimension name. By default extracting is applied over the lat dimension.
lat_range: slice, default: slice(20, 85).: The latitude range of computation using EOFs over the Northern Hemisphere. The default value is from \(\mathrm{20^{\circ}N}\) to \(\mathrm{85^{\circ}N}\).
time_dim: str, default: time.: The time coordinate dimension name.

Returns¶

The monthly/seasonally mean CGT index (xarray.DataArray).