EMEP 50 Kilometer Grid - ESRI:102068

WKT

PROJCS["EMEP_50_Kilometer_Grid", 
	GEOGCS["GCS_Sphere_EMEP", 
		DATUM["D_Sphere_EMEP", 
			SPHEROID["Sphere_EMEP", 6370000.0, 0.0]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Stereographic_North_Pole"], 
	PARAMETER["False_Easting", 8.0], 
	PARAMETER["False_Northing", 110.0], 
	PARAMETER["Central_Meridian", -32.0], 
	PARAMETER["Standard_Parallel_1", 60.0], 
	UNIT["50_Kilometers", 50000.0]]

WKT2

PROJCRS["EMEP_50_Kilometer_Grid", 
	BASEGEOGCRS["GCS_Sphere_EMEP", 
		DATUM["D_Sphere_EMEP", 
			ELLIPSOID["Sphere_EMEP", 6370000.0, 0.0]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Longitude (lon)", east, 
			ORDER[1]], 
		AXIS["Latitude (lat)", north, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Stereographic_North_Pole", 
		METHOD["Stereographic_North_Pole"], 
		PARAMETER["False_Easting", 8.0, 
			LENGTHUNIT["50_Kilometers", 50000.0]], 
		PARAMETER["False_Northing", 110.0, 
			LENGTHUNIT["50_Kilometers", 50000.0]], 
		PARAMETER["Central_Meridian", -32.0], 
		PARAMETER["Standard_Parallel_1", 60.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["50_Kilometers", 50000.0], 
	ID["Esri", "102068"]]

Data from @esri/proj-codes

{
  "wkid": 102068,
  "latestWkid": 102068,
  "gcsWkid": 104128,
  "macro": "PE_PCS_EMEP_50KM",
  "name": "EMEP_50_Kilometer_Grid",
  "wkt": "PROJCS[\"EMEP_50_Kilometer_Grid\",GEOGCS[\"GCS_Sphere_EMEP\",DATUM[\"D_Sphere_EMEP\",SPHEROID[\"Sphere_EMEP\",6370000.0,0.0]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Stereographic_North_Pole\"],PARAMETER[\"False_Easting\",8.0],PARAMETER[\"False_Northing\",110.0],PARAMETER[\"Central_Meridian\",-32.0],PARAMETER[\"Standard_Parallel_1\",60.0],UNIT[\"50_Kilometers\",50000.0]]",
  "wkt2": "PROJCRS[\"EMEP_50_Kilometer_Grid\",BASEGEOGCRS[\"GCS_Sphere_EMEP\",DATUM[\"D_Sphere_EMEP\",ELLIPSOID[\"Sphere_EMEP\",6370000.0,0.0]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Longitude (lon)\",east,ORDER[1]],AXIS[\"Latitude (lat)\",north,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Stereographic_North_Pole\",METHOD[\"Stereographic_North_Pole\"],PARAMETER[\"False_Easting\",8.0,LENGTHUNIT[\"50_Kilometers\",50000.0]],PARAMETER[\"False_Northing\",110.0,LENGTHUNIT[\"50_Kilometers\",50000.0]],PARAMETER[\"Central_Meridian\",-32.0],PARAMETER[\"Standard_Parallel_1\",60.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"50_Kilometers\",50000.0],ID[\"Esri\",\"102068\"]]",
  "description": "EMEP 50 Kilometer Grid",
  "authority": "Esri",
  "version": "9.0.0",
  "deprecated": "no",
  "areaname": "Europe",
  "extent": {
    "slat": 34,
    "nlat": 85,
    "llon": -30,
    "rlon": 50
  }
}