S.H.
The book "What To Expect The Toddler Years" is real great. I suggest that.
Next, your baby is young... they don't even know how to communicate. Their emotions are not even fully developed yet... nor do they understand how to cope with frustration. Its hard for the baby too....
Is she napping regularly???? Some babies and kids, get like that when:
1) they are over-tired
2) they are tired
3) they are hungry
4) They are over-stimulated.
At this age... distraction and redirection is what is suggested. You cannot "lecture" a baby at this age... they are not cognitively there yet.
Jut try hugging her.... take her out when she is NOT tired or over-tired. And I never took my kids out at nap time either. That is what I did with my kids as babies. Then they were in a better mood.
Babies, when over-stimulated.... will also cry/scream... because it is their only way of "shutting-out" what is bothering them. They don't have the fully developed skills... or talking or communicating succinctly yet.
Sometimes when out... all that hussle and bussle/noises/rushing around, will sometimes tweak a baby... because its just an over-load on their senses....
So, try to figure out what her triggers are... and what tweaks her... and get to know HER 'cues' of discomfort etc.
Sometimes, just blowing gently on their face... will get them out of their "fussy" moment.
Or start blowing bubbles... that is what I did. It distracts them...
A baby this age is going through TONS of changes... cognitively and physically... AND they CANNOT do... what is in their heads. They don't have the coordination nor communication to do everything they may want. So they get frustrated. It is growing-pains... for the child. Its not easy for them.....
all the best,
Susan