I'm pointing out that you don't understand the difference between reflectivity and absorptivity. They are not fractions that add up to 1, they are independent of each other. That's your fundamental error here.
Liquid water has zero reflectance in the far IR. That means liquid water absorbs 100% in the far IR, provided that there's more than a millimeter of it.
Absorptivity has nothing to do with that. Absorptivity describes how far radiation penetrates before being absorbed. There's no question that it's getting absorbed, since it wasn't reflected.
Since we had the CMA's tonight, I'd like to post my favorite country song,"OdeTo Billy Bob"
It was the third of June, another scorching hot Michigan day
Seawater's in the house, me 'n brother was bailin' away
And at dinner time we stopped and walked out of the house to eat
And Mama hollered out the back door "y'all remember to dry your feet"
And then she said "I got some news this mornin' from Maple Ridge"
"Today Billy Bob the Scientist jumped off the Mackinac Bridge"
'n' Papa said to Mama as he passed around the blackeyed peas
"Well Billy Bob never had a lick of sense, pass the biscuits, please"
"There's five more acres in the lower forty under water now"
'n' Mama said it was shame about Billy Bob, anyhow
Seems like nothin' ever comes to no good up on Maple Ridge
And now Billy Bob the Scientist jumped off the Mackinac Bridge
'n' Brother said he recollected when he and Tom and Billy Bob
Put a frog in boiling water at the Junior High science lab
And wasn't I talkin' to him at college last Friday night?
"I'll have another piece-a soybean pie, you know it don't seem right"
"I saw him at the desalination plant yesterday on Maple Ridge"
"And now ya tell me Billie Bob's jumped off the Mackinac Bridge"
'n' Mama said to me "Child, what's happened to your appetite?"
"I've been cookin' all morning and you haven't touched a single bite"
"That nice young preacher, Brother Taylor, rowed over today"
"Said he'd be pleased to have dinner on Sunday, oh, by the way"
"He said he saw a girl that looked a lot like you up on Maple Ridge"
"And she and Billy Bob was throwin'
somethin' off the Mackinac Bridge"
A year has come 'n' gone since we heard the news 'bout Billy Bob
Me 'n' brother moved upstairs, now the water's up to the doo' knob
There was malaria going 'round, Papa caught it and he died last Spring
And now Mama doesn't seem to wanna do much of anything
And me, I spend a lot of time dumpin' WUWT files on Maple Ridge
And drop them into the steamy water off the Mackinac Bridge